Stargate Chronology

The Stargate timeline is particularly difficult. Several episodes have concrete dates, many episodes take place a certain number of months or years after other episodes, and many episodes take place over a set number of weeks or months. All of this added together makes things difficult because airdates rarely follow any of the episodes’ internal chronological information. Episodes which air only weeks apart could be set nearly a year apart based on internal information.

The following chronology is an attempt to sort all of this information out into a coherent timeline. I initially created it using an Excel spreadsheet which helped me calculate lengths of time when I entered in the internal information. It is certainly not perfect and could be tweaked at any time as I pick up other information on subsequent viewings of episodes.

The timeline below includes information from the Stargate movie, the Stargate SG-1, Stargate Atlantis, and Stargate Universe series, and the short-lived animated Stargate Infinity series. At a future time, I may go back through and add the various novels but I currently have no plans on that.

1928

• Stargate Origins

1996

August:
• Stargate

  [Takes place over several months, ending around October/November.]

1998

February:
• 10 February: “Children of the Gods” (SG-1)

  [One year after Stargate and seven years before “Inauguration” (SG-1).]

• “The Enemy Within” (SG-1)

  [Immediately after “Children of the Gods” (SG-1).]

March:

• “Emancipation” (SG-1)
• “The Broca Divide” (SG-1)

  [Takes place in March.]

April:

• “The First Commandment” (SG-1)

May:

• “Cold Lazarus” (SG-1)

  [Several months after “Children of the Gods” (SG-1).]

• “The Nox” (SG-1)

June:

• “Brief Candle” (SG-1)

July:

• “Thor’s Hammer” (SG-1)

August:

• “The Torment of Tantalus” (SG-1)

  [Six months after “Children of the Gods” (SG-1).]

• “Bloodlines” (SG-1)

September:

• “Fire and Water” (SG-1)
• “Hathor” (SG-1)
• “Singularity” (SG-1)

October:

• “Cor-ai” (SG-1)
• “Enigma” (SG-1)

November:

• “Solitudes” (SG-1)
• “Tin Man” (SG-1)
• “There But For the Grace of God” [Part 1] (SG-1)

  [Two years after Stargate and one year after “Children of the Gods” (SG-1).]

December:

• “Politics” [Part 2] (SG-1)

  [One day after “There But For the Grace of God” (SG-1).]

• “Within the Serpent’s Grasp” [Part 3] (SG-1)
• 4 December: “The Serpent’s Lair” [Part 4] (SG-1)

  [Must end on either 22 January 1998 or 4 December 1998.]

• “In the Line of Duty” (SG-1)
• “Prisoners” (SG-1)
• “The Gamekeeper” (SG-1)

1999

January:
• “Need” (SG-1)
• “Thor’s Chariot” (SG-1)
• “Message in a Bottle” (SG-1)

February:

• “Family” (SG-1)
• 10 February: “Secrets” (SG-1)

  [Exactly one year after “Children of the Gods” (SG-1) and several months after “The Serpent’s Lair” (SG-1).]

• “Bane” (SG-1)

March:

• “The Tok’ra,” Parts 1 & 2 (SG-1)
• “Spirits” (SG-1)

April:

• “Touchstone” (SG-1)
• “The Fifth Race” (SG-1)

May:

• “A Matter of Time” (SG-1)
• “Holiday” (SG-1)

June:

• “Serpent’s Song” (SG-1)
• “One False Step” (SG-1)
• “Show and Tell” (SG-1)

July:

• “1969” (SG-1)
• “Out of Mind” [Part 1] (SG-1)
• “Into the Fire” [Part 2] (SG-1)

August:

• “Seth” (SG-1)
• “Fair Game” (SG-1)

September:

• “Legacy” (SG-1)
• “Learning Curve” (SG-1)

October:

• “Point of View” (SG-1)
• “Deadman Switch” (SG-1)

November:

• “Demons” (SG-1)
• “Rules of Engagement” (SG-1)
• “Forever in a Day” (SG-1)

December:

• “Past and Present” (SG-1)
• “Jolinar’s Memories” [Part 1] (SG-1)
• “The Devil You Know” [Part 2] (SG-1)

2000

January:
• “Foothold” (SG-1)
• “Pretense” (SG-1)

February:

• “Urgo” (SG-1)
• “A Hundred Days” (SG-1)

March:

• “Shades of Grey” (SG-1)
• “New Ground” (SG-1)

April:

• “Maternal Instinct” (SG-1)
• “Crystal Skull” (SG-1)

May:

• “Nemesis” [Part 1] (SG-1)
• “Small Victories” [Part 2] (SG-1)
• “The Other Side” (SG-1)

June:

• “Upgrades” (SG-1)
• “Crossroads” (SG-1)
• “Divide and Conquer” (SG-1)

July:

• “Watergate” (SG-1)

  [Two months after “Small Victories” (SG-1).]

• “Window of Opportunity” (SG-1)

October:

• “The First Ones” (SG-1)
• “Scorched Earth” (SG-1)
• “Beneath the Surface” (SG-1)

November:

• “Point of No Return” (SG-1)
• “Tangent” (SG-1)
• “The Curse” (SG-1)

December:

• “The Serpent’s Venom” (SG-1)
• “Chain Reaction” (SG-1)
• “2010” (SG-1)

  [Must take place in the year 2000.]

• “Absolute Power” (SG-1)

2001

January:
• “The Light” (SG-1)
• “Prodigy” (SG-1)
• “Entity” (SG-1)
• “Double Jeopardy” (SG-1)

February:

• “Exodus” [Part 1] (SG-1)
• “Enemies” [Part 2] (SG-1)
• “Threshold” [Part 3] (SG-1)

  [Several weeks after “Enemies” (SG-1).]

March:

• “Ascension” (SG-1)
• “The Fifth Man” (SG-1)
• “Red Sky” (SG-1)

April:

• “Rite of Passage” (SG-1)

May:

• “Beast of Burden” (SG-1)
• “The Tomb” (SG-1)

  [Ten months after “Watergate” (SG-1).]

June:

• “Between Two Fires” (SG-1)

July:

• “2001” (SG-1)

  [Must take place in the year 2001. Seven months after “2010” (SG-1).]

2002

May:
• “Desperate Measures” (SG-1)

June:

• “Wormhole X-treme!” (SG-1)
• “Proving Ground” (SG-1)
• “48 Hours” (SG-1)

July:

• “Summit” [Part 1] (SG-1)
• “Last Stand” [Part 2] (SG-1)

August:

• “Fail Safe” (SG-1)

September:

• “The Warrior” (SG-1)
• “Menace” (SG-1)

October:

• “The Sentinel” (SG-1)
• “Meridian” (SG-1)

November:

• “Revelations” (SG-1)

2003

February:
• “Redemption,” Parts 1 &amp 2 (SG-1)

  [Three months after “Revelations” (SG-1).]

• “Descent” (SG-1)

March:

• “Frozen” (SG-1)
• “Nightwalkers” (SG-1)

  [Ten months after “Desperate Measures” (SG-1).]

June:

• “Abyss” (SG-1)

October:

• “Shadowplay” (SG-1)
• “The Other Guys” (SG-1)

November:

• “Allegiance” (SG-1)

  [Several months after “The Warrior” (SG-1).]

December:

• “Cure” (SG-1)
• “Prometheus” [Part 1] (SG-1)
• “Unnatural Selection” [Part 2] (SG-1)

2004

January:
• “Sight Unseen” (SG-1)

  [Over three months after “Shadowplay” (SG-1).]

• “Smoke and Mirrors” (SG-1)

February:

• “Paradise Lost” (SG-1)

March:

• “Metamorphosis” (SG-1)
• “Disclosure” (SG-1)

April:

• “Forsaken” (SG-1)
• “The Changeling” (SG-1)

May:

• “Momento” (SG-1)
• “Prophecy” (SG-1)

June:

• “Full Circle” [Part 1] (SG-1)
• “Fallen” [Part 2] (SG-1)
• “Homecoming” [Part 3] (SG-1)
• “Fragile Balance” (SG-1)

July:

• “Orpheus” (SG-1)

August:

• “Revisions” (SG-1)
• “Lifeboat” (SG-1)

September:

• “Enemy Mine” (SG-1)
• “Space Race” (SG-1)

October:

• “Avenger 2.0” (SG-1)
• “Birthright” (SG-1)
• “Evolution,” Parts 1 & 2 (SG-1)

November:

• “Grace” (SG-1)
• “Fallout” (SG-1)
• “Chimera” (SG-1)
• “Death Knell” (SG-1)

  [One month after “Evolution” (SG-1) and seven years after “Children of the Gods” (SG-1).]

December:

• “Heroes,” Parts 1 & 2 (SG-1)

  [Six years after “Children of the Gods” (SG-1) and one year after “Prometheus” (SG-1).]

2005

January:
• “Resurrection” (SG-1)
• 21 January: “Inauguration” (SG-1)

  [Must take place in January immediately following a United States’ election year. Less than a month after “Heroes” (SG-1) and seven years after “Children of the Gods” (SG-1).]

February:

• “Lost City,” Parts 1 & 2 (SG-1)

April:

• “New Order,” Parts 1 & 2 (SG-1)

  [Ends three months after the beginning of “Lost City” (SG-1).]

May:

• “Rising,” Parts 1 & 2 (SGA)
• “Hide and Seek” (SGA)

  [A couple of days after “Rising” (SGA).]

• “Lockdown” (SG-1)
• “Zero Hour” (SG-1)

June:

• “Icon” (SG-1)
• “Thirty-Eight Minutes” (SGA)
• “Avatar” (SG-1)
• “Affinity” (SG-1)

July:

• “Covenant” (SG-1)

  [Five months after “Lost City” (SG-1).]

August:

• “Sacrifices” (SG-1)
• “Suspicion” (SGA)

  [Three months after “Rising” (SGA).]

• “Childhood’s End” (SGA)
• “Endgame” (SG-1)
• “Poisoning the Well” (SGA)

  [About two weeks after “Suspicion” (SGA).]

• “Underground” (SGA)

September:

• “Home” (SGA)

  [Between “Covenant” (SG-1) and “Prometheus Unbound” (SG-1).]

• “Gemini” (SG-1)

  [Four months after “New Order” (SG-1).]

• “Prometheus Unbound” (SG-1)

  [Occurs simultaneously with “Gemini” (SG-1).]

October:

• “The Storm” [Part 1] (SGA)
• “The Eye” [Part 2] (SGA)
• “It’s Good To Be King” (SG-1)
• “The Defiant One” (SGA)

November:

• “Hot Zone” (SGA)

December:

• “Full Alert” (SG-1)
• “Sanctuary” (SGA)

2006

January:
• “Before I Sleep” (SGA)

February:

• “Citizen Joe” (SG-1)
• “The Brotherhood” (SGA)
• “Letters From Pegasus” (SG-1)

  [Several weeks after “Hot Zone” (SGA) and several days after “The Brotherhood” (SGA).]

March:

• “The Gift” (SGA)
• “Reckoning,” Parts 1 & 2 (SG-1)
• “Threads” [Part 3] (SG-1)

  [Shortly before “The Siege” (SGA).]

• “Moebius,” Parts 1 & 2 (SG-1)

April:

• “The Siege,” Parts 1, 2, & 3 (SGA)

  [After “Moebius” (SG-1).]

June:

• “Avalon,” Parts 1 & 2 (SG-1)

  [Two months after “Moebius” (SG-1).]

• “Origen” [Part 3] (SG-1)
• “The Intruder” (SGA)

  [About two months after “The Siege” (SGA) and eighteen days after “Avalon” (SG-1).]

• “Runner” (SG-1)

  [One week after “The Intruder” (SGA).]

July:

• “The Ties That Bind” (SG-1)

August:

• “Duet” (SGA)

September:

• “The Powers That Be” (SG-1)

October:

• “Condemned” (SGA)

November:

• “Beachhead” (SG-1)

December:

• “Trinity” (SGA)
• “Instinct” [Part 1] (SGA)
• “Conversion” [Part 2] (SGA)
• “Ex Deus Machina” (SG-1)

  [Nine months after “Reckoning” (SG-1).]

2007

January:
• “Babylon” (SG-1)
• “Aurora” (SGA)
• “The Lost Boys” [Part 1] (SGA)
• “The Hive” [Part 2] (SGA)

February:

• “Prototype” (SG-1)
• “Epiphany” (SGA)
• “The Fourth Horseman,” Parts 1 & 2 (SG-1)
• “Critical Mass” (SGA)
• “Collateral Damage” (SG-1)

March:

• “Grace Under Pressure” (SGA)
• “Ripple Effect” (SG-1)

  [After “Home” (SGA).]

• “The Tower” (SGA)
• “Stronghold” (SG-1)
• “The Long Goodbye” (SGA)
• “Ethon” (SG-1)

April:

• “Coup D’etat” (SGA)

  [After “Origen” (SG-1).]

• “Off the Grid” (SG-1)
• “Michael” (SGA)
• “The Scourge” (SG-1)

May:

• “Arthur’s Mantle” (SG-1)
• “Inferno” (SGA)
• “Crusade” [Part 1] (SG-1)
• “Camelot” [Part 2] (SG-1)
• “Flesh and Blood” [Part 3] (SG-1)

  [About the same time as “No Man’s Land” (SGA).]

• “Allies” [Part 1] (SGA)

  [More than two years after “Rising” (SGA).]

• “No Man’s Land” [Part 2] (SGA)

  [After “Flesh and Blood” (SG-1).]

• “Misbegotten” [Part 3] (SGA)

  [Shortly before “The Pegasus Project” (SG-1).]

• “Morpheus” (SG-1)
• “The Pegasus Project” (SG-1)

  [Crossover with Stargate Atlantis. After “Grace Under Pressure” (SGA).]

June:

• “Irresistible” (SGA)

  [After “The Pegasus Project” (SG-1).]

• “Insiders” (SG-1)
• “Uninvited” (SG-1)
• “Sateda” (SGA)

July:

• “200” (SG-1)
• “Progeny” [Part 1] (SGA)
• “The Real World” [Part 2] (SGA)
• “Counterstrike” (SG-1)
• “Common Ground” (SGA)

August:

• “Memento Mori” (SG-1)
• “McKay and Mrs. Miller” (SGA)
• “Company of Thieves” (SG-1)
• “Phantoms” (SGA)

  [After “Ethon” (SG-1).]

September:

• “The Return,” Parts 1 & 2 (SGA)
• “The Quest,” Parts 1 & 2 (SG-1)
• “Line in the Sand” (SG-1)

October:

• “The Road Not Taken” (SG-1)

  [After “McKay and Mrs. Miller” (SGA).]

• “Echoes” (SGA)

November:

• “The Shroud” (SG-1)

  [After “Echoes” (SGA).]

• “Irresponsible” (SGA)

  [Several months after “Irresistable” (SGA).]

• “Bounty” (SG-1)
• “Bad Guys” (SG-1)
• “Tao of Rodney” (SGA)

  [After “Prototype” (SG-1).]

• “Talion” (SG-1)

December:

• “The Game” (SGA)
• “The Ark” (SGA)
• “Family Ties” (SG-1)
• “Sunday” (SGA)

  [A year and a half after “Runner” (SGA) and several weeks after “Tao of Rodney” (SGA).]

2008

January:
• “Submersion” (SGA)
• “Dominion” (SG-1)
• “Vengeance” (SGA)

February:

• “Unending” (SG-1)
• Stargate: The Ark of Truth
• “First Strike” [Part 1] (SGA)

  [After Stargate: The Ark of Truth.]

• “Adrift” [Part 2] (SGA)
• “Lifeline” [Part 3] (SGA)

March:

• “Reunion” (SGA)

April:

• “Doppleganger” (SGA)

May:

• “Travelers” (SGA)
• “Tabula Rasa” (SGA)

June:

• “Missing” (SGA)
• “The Seer” (SGA)

  [Three months after “Reunion” (SGA).]

July:

• “Miller’s Crossing” (SGA)

August:

• “This Mortal Coil” [Part 1] (SGA)
• “Be All My Sins Remember’d” [Part 2] (SGA)

  [Two months after “Missing” (SGA).]

• “Spoils of War” [Part 3] (SGA)

September:

• “Quarantine” (SGA)
• “Harmony” (SGA)

October:

• “Outcast” (SGA)

November:

• “Trio” (SGA)
• “Midway” (SGA)

December:

• “The Kindred,” Parts 1 & 2 (SGA)

  [Six months after “Missing” (SGA).]

2009

January:
• “The Last Man” [Part 1] (SGA)
• “Search and Rescue” [Part 2] (SGA)
• Stargate: Continuum

  [Shortly after “Search and Rescue” (SGA).]

February:

• “The Seed” (SGA)

  [A month after “Search and Rescue” (SGA) and two months after “The Kindred” (SGA).]

March:

• “Broken Ties” (SGA)

May:

• “The Daedalus Variations” (SGA)

June:

• “Ghost in the Machine” (SGA)

July:

• “The Shrine” (SGA)

August:

• “Whispers” (SGA)

  [Six months after “The Seed” (SGA).]

• “The Queen” (SGA)

September:

• “Tracker” (SGA)
• “First Contact” [Part 1] (SGA)
• “The Lost Tribe” [Part 2] (SGA)
• “Outsiders” (SGA)
• “Inquisition” (SGA)

October:

• “The Prodigal” (SGA)

November:

• “Remnants” (SGA)

  [Several weeks after “The Prodigal” (SGA) and nine months after “The Seed” (SGA).]

• “Brain Storm” (SGA)

  [Sometime after 20 November 2009]

December:

• “Infection” (SGA)
• “Identity” (SGA)
• “Vegas” (SGA)
• “Enemy at the Gate” (SGA)

2010

January:
• “Air,” Parts 1, 2, & 3 (SGU)
• “Eli’s Room” (SGU-K)

  [During “Air” (SGU).]

• “Disgusting Habit” (SGU-K)

  [Before “Darkness” (SGU).]

• “Darkness” [Part 1] (SGU)

  [One day after “Air” (SGU).]

• “Corridor Conversation” (SGU-K)

  [During or after “Darkness” (SGU) and before “Light” (SGU) and “You Okay?” (SGU-K).]

• “Light” [Part 2] (SGU)
• “Water” (SGU)
• “Get Outta Here” (SGU-K)

  [After “Water” (SGU).]

• “Not the Com Lab” (SGU-K)

  [After “Light” (SGU).]

• “No Idea” (SGU-K)

  [After “Light” (SGU).]

• “The Stargate Room” (SGU-K)

  [After “Light” (SGU).]

• “Don’t Encourage Him” (SGU-K)

  [Between “Darkness” (SGU) and “Covered Kino” (SGU-K).]

• “Marked Hatch” (SGU-K)

  [After “Light” (SGU).]

• “Not Supposed To Be In Here” (SGU-K)

  [After “Light” (SGU).]

• “Nobody Cares” (SGU-K)

  [After “Light” (SGU) and before “We Volunteer To Do This” (SGU-K).]

• “Horrible Accident” (SGU-K)

  [After “Not the Com Lab” (SGU-K) and before “Aftermath” (SGU) and “Kino Race” (SGU-K).]

• “Kino Race” (SGU-K)

  [After “Light” (SGU).]

• “Covered Kino” (SGU-K)

  [After “Don’t Encourage Him” (SGU-K).]

• “You Okay?” (SGU-K)

  [After “Corridor Conversation” (SGU-K) and before “Earth” (SGU).]

February:

• “Earth” (SGU)
• “Do I Look Stupid?” (SGU-K)

  [During “Earth” (SGU) and before “Variety” (SGU-K).]

• “Variety” (SGU-K)

  [During “Earth” (SGU) and shortly before Valentine’s Day.]

• “All Telford’s Fault” (SGU-K)

  [During “Earth” (SGU) and after “Variety” (SGU-K).]

• “What’s That Light” (SGU-K)

  [Shortly after “Earth” (SGU) and before “Divided” (SGU).]

• “Time” (SGU)
• “New Kind of Crazy” (SGU-K)

  [After “Time” (SGU).]

• “Only Run When Chased” (SGU-K)

  [Near “Life” (SGU).]

• “Want Me To Bust Him Up?” (SGU-K)

  [Before “Life” (SGU).]

March:

• “Life” (SGU)
• “Justice” (SGU)

  [One week after “Life” (SGU).]

• “The Apple Core” (SGU-K)

  [After “Air” (SGU).]

• “Not Just For Posterity” (SGU-K)

  [After “Life” (SGU).]

April:

• “Space” [Part 1] (SGU)

  [About a week after “Justice” (SGU).]

• “Divided” [Part 2] (SGU)
• “Faith” (SGU)
• “We Volunteer To Do This” (SGU-K)

  [After “Nobody Cares” (SGU-K).]

May:

• “Human” (SGU)
• “Wait For It” (SGU-K)

  [After “Justice” (SGU).]

June:

• “Lost” (SGU)

  [Twenty-two weeks after “Air” (SGU) and three weeks after “Faith” (SGU).]

• “Sabotage” (SGU)

  [Two days after “Lost” (SGU).]

July:

• “Pain” (SGU)
• “Drop the Sirs” (SGU-K)

  [After “Sabotage” (SGU).]

• “Like a Hug” (SGU-K)

  [After “Sabotage” (SGU).]

August:

• “Subversion” (SGU)
• “Incursion,” Parts 1 & 2 (SGU)
• “Intervention” [Part 3] (SGU)
• “Chloe’s Room” (SGU-K)
• “Favorite Meal of All Time” (SGU-K)

  [After “Justice” (SGU).]

• “Not Being There” (SGU-K)

  [Before “Aftermath” (SGU).]

• “One Long Endless Night” (SGU-K)

  [One day after Lt. James’s birthday.]

• “Painful Moments” (SGU-K)

  [Before “Aftermath” (SGU).]

• “All the Stages” (SGU-K)

  [After “Pain” (SGU) and four months after “Air” (SGU).]

September:

• “Aftermath” (SGU)

October:

• “Awakening” (SGU)

  [About nine months after “Air” (SGU).]

• “Pathogen” (SGU)
• “Cloverdale” (SGU)
• “Trial and Error” (SGU)
• “The Greater Good” (SGU)
• “Malice” (SGU)
• “Visitation” (SGU)

  [Several months after “Faith” (SGU).]

November:

• “Resurgence” (SGU)

  [Ten months after “Air” (SGU) and one month after “Awakening” (SGU).]

• “Deliverance” (SGU)

December:

• “Twin Destinies” (SGU)

2011

January:
• “Alliances” (SGU)

  [One year after “Air” (SGU).]

• “Hope” (SGU)

  [Six days after “Alliances” (SGU).]

• “Seizure” (SGU)

February:

• “The Hunt” (SGU)
• “Common Descent” [Part 1] (SGU)
• “Epilogue” [Part 2] (SGU)

March:

• “Blockade” (SGU)
• “Gauntlet” (SGU)

c. 2030

January:
• “Decision” (SGI)

  [At least thirty years after “Children of the Gods” (SG-1).]

• “Double Duty” (SGI)

February:

• “The Best World” (SGI)
• “Coming Home” (SGI)

March:

• “Mentor” (SGI)
• “Hot Water” (SGI)

April:

• “Phobia” (SGI)
• “Can I Keep It?” (SGI)

May:

• “Who Are You?” (SGI)
• “Greed” (SGI)

June:

• “Stones” (SGI)
• “Initiation” (SGI)

July:

• “The Mother of Invention” (SGI)
• “Us and Them” (SGI)
• “The Face of Evil” (SGI)

August:

• “The Key” (SGI)
• “Chariot of the Sun” (SGI)
• “The Answer” (SGI)

September:

• “The Look” (SGI)
• “Feet of Clay” (SGI)

October:

• “The Natural” (SGI)
• “Big Mistake” (SGI)

November:

• “The Illustrated Stacey” (SGI)
• “The Long Haul” (SGI)

December:

• “Museum” (SGI)
• “Reality” (SGI)