Character crossover appearances

Real world article
(written from a Production point of view)

The following is a list of character appearances in another of the series.

Star Trek: The Original Series

• James T. Kirk
  • Star Trek Generations
  • DS9: "Trials and Tribble-ations" (archive footage)
  • ENT: "These Are the Voyages..." (archive voice only)
  • Star Trek Beyond (photograph)

• Christopher Pike (played by Anson Mount, originally played by Jeffrey Hunter and Sean Kenney)
  • DIS:
    • "Brother"
    • "New Eden"
    • "Point of Light"
    • "An Obol for Charon"
    • "Saints of Imperfection"
    • "The Sound of Thunder"
    • "Light and Shadows"
    • "If Memory Serves"
    • "Project Daedalus"
    • "The Red Angel"
    • "Perpetual Infinity"
    • "Through the Valley of Shadows"
    • "Such Sweet Sorrow"
    • "Such Sweet Sorrow, Part 2"

• Spock (As played by Leonard Nimoy)
  • TNG:
    • "Unification I"
    • "Unification II"
  • DS9: "Trials and Tribble-ations" (archive footage)
  • Star Trek
  • Star Trek Into Darkness
  • Star Trek Beyond (photographs)
  • DIS:
    • "Brother"
    • "Light and Shadows"
    • "If Memory Serves"
    • "Project Daedalus"
    • "The Red Angel"
    • "Perpetual Infinity"
    • "Through the Valley of Shadows"
    • "Such Sweet Sorrow"
    • "Such Sweet Sorrow, Part 2"

• Leonard McCoy
  • TNG: "Encounter at Farpoint"
  • DS9: "Trials and Tribble-ations" (archive footage)
  • Star Trek Beyond (photograph)

• Montgomery Scott
  • TNG: "Relics"
  • Star Trek Generations
  • DS9: "Trials and Tribble-ations" (archive footage)
  • Star Trek Beyond (photograph)

• Hikaru Sulu
  • VOY: "Flashback"
  • Star Trek Beyond (photograph)

• Pavel Chekov
  • Star Trek Generations
  • DS9: "Trials and Tribble-ations" (archive footage)
  • Star Trek Beyond (photograph)

• Uhura
  • DS9: "Trials and Tribble-ations" (archive footage)
  • Star Trek Beyond (photograph)

• Zefram Cochrane (played by James Cromwell, originally played by Glenn Corbett)
  • Star Trek: First Contact
  • ENT:
    • "Broken Bow"
    • "In a Mirror, Darkly" (archive footage)

• Nilz Baris
  • DS9: "Trials and Tribble-ations" (archive footage)

• Arne Darvin
  • DS9: "Trials and Tribble-ations" (as his older self and also in archive footage)

• Freeman
  • DS9: "Trials and Tribble-ations" (archive footage)

• Galloway
  • DS9: "Trials and Tribble-ations" (archive footage)

• Amanda Grayson (originally played by Jane Wyatt)
  • TAS: "Yesteryear" (voiced by Majel Barrett-Roddenberry)
  • DIS: (played by Mia Kirshner)
    • "Lethe"
    • "Will You Take My Hand?"
    • "Brother"
    • "Point of Light"
    • "Light and Shadows"
    • "Through the Valley of Shadows"
    • "Such Sweet Sorrow"
    • "Such Sweet Sorrow, Part 2"

• Colonel Green (played by Steven Rankin, originally played by Phillip Pine)
  • ENT: "Demons"

• Hadley
  • DS9: "Trials and Tribble-ations" (archive footage)

• Cyrano Jones
  • TAS: "More Tribbles, More Troubles"
  • DS9: "Trials and Tribble-ations" (archive footage)

• Kahless the Unforgettable (played by Kevin Conway, originally played by Robert Herron)
  • TNG: "Rightful Heir" (as his clone)

• Kang
  • DS9: "Blood Oath"
  • VOY: "Flashback"

• Koloth
  • TAS: "More Tribbles, More Troubles" (voiced by James Doohan, originally played by William Campbell)
  • DS9: "Blood Oath"

• Kor
  • TAS: "The Time Trap" (voiced by James Doohan, originally played by John Colicos)
  • DS9:
    • "Blood Oath"
    • "The Sword of Kahless"
    • "Once More Unto the Breach"

• Korax
  • TAS: "More Tribbles, More Troubles" (voiced by James Doohan, originally played by Michael Pataki)
  • DS9: "Trials and Tribble-ations" (archive footage)

• Leslie
  • DS9: "Trials and Tribble-ations" (archive footage)

• Lurry
  • DS9: "Trials and Tribble-ations" (archive footage)

• Harry Mudd (played by Rainn Wilson, originally played by Roger C. Carmel)
  • TAS: "Mudd's Passion"
  • DIS:
    • "Choose Your Pain"
    • "Magic to Make the Sanest Man Go Mad"
  • ST: "The Escape Artist"

• Stella Mudd (played by Katherine Barrell, originally played by Kay Elliot)
  • DIS: "Magic to Make the Sanest Man Go Mad"

• Number One (played by Rebecca Romijn, originally played by Majel Barrett-Roddenberry)
  • DIS:
    • "An Obol for Charon"
    • "Such Sweet Sorrow"
    • "Such Sweet Sorrow, Part 2"

• Janice Rand
  • VOY: "Flashback"

• Sarek (played by James Frain, originally played by Mark Lenard)
  • TAS: "Yesteryear"
  • TNG:
    • "Sarek"
    • "Unification I"
  • DIS:
    • "The Vulcan Hello"
    • "Battle at the Binary Stars"
    • "Lethe"
    • "The Wolf Inside" (archive footage)
    • "The War Without, The War Within"
    • "Will You Take My Hand?"
    • "Brother"
    • "Light and Shadows"
    • "Such Sweet Sorrow"

• Surak (played by Bruce Gray, originally played by Barry Atwater)
  • ENT: "Awakening" (In a Katric vision)

• T'Pau (played by Kara Zediker and an uncredited Betty Matsushita, originally played by Celia Lovsky)
  • VOY: "Darkling" (hologram)
  • ENT:
    • "Awakening"
    • "Kir'Shara"

• Vina (played by Melissa George, originally played by Susan Oliver)
  • DIS: "If Memory Serves"

• Bob Wesley (voiced by James Doohan, originally played by Barry Russo)
  • TAS: "One of Our Planets Is Missing"

Star Trek: The Next Generation

• Jean-Luc Picard
  • DS9: "Emissary"
  • ENT: "These Are the Voyages..." (archive voice only)

• William T. Riker
  • VOY: "Death Wish"
  • ENT: "These Are the Voyages..."

• Data
  • ENT: "These Are the Voyages..." (voice only)

• Geordi La Forge
  • VOY: "Timeless" (alternate future)

• Deanna Troi
  • VOY:
    • "Pathfinder"
    • "Life Line"
    • "Inside Man"
  • ENT: "These Are the Voyages..."

• Worf
  • DS9: series regular (seasons 4-7) except:
    • "Rocks and Shoals"
    • "The Magnificent Ferengi"
    • "Chrysalis"
    • "Prodigal Daughter"

• Arridor
  • VOY: "False Profits"

• B'Etor
  • DS9: "Past Prologue"

• Reginald Barclay
  • VOY:
    • "Projections" (holographic image)
    • "Pathfinder"
    • "Life Line"
    • "Inside Man"
    • "Author, Author"
    • "Endgame"

• Boothby
  • VOY:
    • "The Fight" (in Chakotay's hallucination and a hologram)
    • "In the Flesh" (Species 8472 in disguise)

• Borg Queen
  • VOY:
    • "Dark Frontier" (played by Susanna Thompson, originally played by Alice Krige)
    • "Unimatrix Zero" (played by Susanna Thompson)
    • "Unimatrix Zero, Part II" (played by Susanna Thompson)
    • "Endgame" (played by Alice Krige)

• Gowron
  • DS9:
    • "The House of Quark"
    • "The Way of the Warrior"
    • "Broken Link"
    • "Apocalypse Rising"
    • "By Inferno's Light"
    • "When It Rains..."
    • "Tacking Into the Wind"

• Kol
  • VOY: "False Profits" (played by Leslie Jordan, originally played by an uncredited J.R. Quinonez)

• Kalita
  • DS9: "Defiant"

• Kurn
  • DS9: "Sons of Mogh"

• Locutus of Borg
  • DS9: "Emissary"

• Lursa
  • DS9: "Past Prologue"

• Alynna Nechayev
  • DS9:
    • "The Maquis, Part II"
    • "The Search, Part II" (virtual)

• Neral
  • DS9: "Inter Arma Enim Silent Leges" (played by Hal Landon, Jr., originally played by Norman Large)

• Keiko O'Brien
  • DS9:
    • "A Man Alone"
    • "If Wishes Were Horses"
    • "In the Hands of the Prophets"
    • "The Siege"
    • "Cardassians"
    • "Rivals"
    • "Armageddon Game"
    • "Whispers"
    • "Tribunal"
    • "The House of Quark"
    • "Fascination"
    • "Accession"
    • "Hard Time"
    • "Body Parts"
    • "Looking for par'Mach in All the Wrong Places"
    • "The Assignment"
    • "The Begotten"
    • "Time's Orphan"
    • "What You Leave Behind"

• Miles O'Brien
  • DS9: series regular except:
    • "Dax"
    • "The Passenger"
    • "Move Along Home"
    • "Necessary Evil"
    • "Blood Oath"
    • "Equilibrium"
    • "Second Skin"
    • "Indiscretion"
    • "Let He Who Is Without Sin..."
    • "Things Past"
    • "In the Pale Moonlight"
    • "The Reckoning"
    • "Valiant"
    • "Profit and Lace"

• Molly O'Brien
  • DS9:
    • "A Man Alone"
    • "If Wishes Were Horses"
    • "The Siege"
    • "Whispers"
    • "Fascination"
    • "Accession"
    • "Hard Time"
    • "Body Parts"
    • "The Assignment"
    • "Time's Orphan"
    • "What You Leave Behind"

• Q
  • DS9: "Q-Less"
  • VOY:
    • "Death Wish"
    • "The Q and the Grey"
    • "Q2"

• Thomas Riker
  • DS9: "Defiant"

• Alexander Rozhenko
  • DS9:
    • "The Way of the Warrior" (picture only)
    • "Sons and Daughters" (played by Marc Worden, originally played by Jon Steuer and Brian Bonsall)
    • "You Are Cordially Invited" (played by Marc Worden)

• Lwaxana Troi
  • DS9:
    • "The Forsaken"
    • "Fascination"
    • "The Muse"

• Vash
  • DS9: "Q-Less"

Star Trek: Deep Space Nine

• Julian Bashir
  • TNG: "Birthright, Part I"

• Quark
  • TNG: "Firstborn"
  • VOY: "Caretaker"
  • Star Trek: Insurrection (scenes cut)

• Worf
  • Star Trek: First Contact
  • Star Trek: Insurrection
  • Star Trek Nemesis

• Broik
  • VOY: "Caretaker"

• Admiral Chekote
  • TNG: "Gambit, Part I"

• Gul Evek
  • TNG:
    • "Journey's End"
    • "Preemptive Strike"
  • VOY: "Caretaker"

• Morn
  • TNG: "Birthright, Part I"
  • VOY: "Caretaker"

Star Trek: Voyager

• Kathryn Janeway
  • Star Trek Nemesis

• Tuvok
  • DS9: "Through the Looking Glass" (as mirror Tuvok)

• Dr. Lewis Zimmerman
  • DS9: "Doctor Bashir, I Presume"

• EMH
  • DS9: "Doctor Bashir, I Presume" (as Deep Space 9 EMH)
  • Star Trek: First Contact (as USS Enterprise-E EMH)

Star Trek: Discovery

• Saru
  • ST: "The Brightest Star"

• Sylvia Tilly
  • ST: "Runaway"

• Philippa Georgiou
  • ST: "The Brightest Star"

Star Trek: Short Treks

• Me Hani Ika Hali Ka Po
  • DIS:
    • "Such Sweet Sorrow"
    • "Such Sweet Sorrow, Part 2"

• Siranna
  • DIS:
    • "The Sound of Thunder"
    • "Such Sweet Sorrow, Part 2"

Historical

• Leonardo da Vinci
  • TOS: "Requiem for Methuselah" (as Flint)
  • VOY:
    • "Scorpion" (hologram)
    • "Concerning Flight" (hologram)

• Isaac Newton
  • TNG: "Descent" (hologram)
  • VOY: "Death Wish"