Thomas Riker
- Full Name: Thomas Riker
- Born: 2335; Alaska, United States, Earth (TNG: "The Icarus Factor", "Conundrum", "Lower Decks")
- Created c.2361 upon transporter accident duplicating William Riker (TNG: "Second Chances")
- Life identical up to that point, presented thusly
- Species: Human
- Gender: Male
- Father: Kyle Riker
- Mother: Annie Riker
- Brother: William Riker
- November 2353: Cadet, Starfleet Academy command track (TNG: "The First Duty")
- September 2357: Ensign, Starfleet
- April 2358: Ensign, alpha shift conn officer, Starfleet; USS Pegasus (TNG: "The Pegasus")
- By 2359: Ensign, Starfleet; Betazed (TNG: "Encounter at Farpoint", "Ménage à Troi", "Second Chances")
- By 2361: Lieutenant, Starfleet; USS Potemkin (TNG: "Peak Performance", "Second Chances"; DS9 Novel: Avatar, Book One)
- 2361: Created, trapped on Nervala IV research station (TNG: "Second Chances")
- December 1, 2369: Rediscovered by USS Enterprise (TNG: "Second Chances")
- December 2369: Lieutenant, Starfleet; USS Gandhi (TNG: "Second Chances")
- June 2371: Defection from Starfleet (DS9: "Defiant")
- Likely not long before hijacking of USS Defiant given no security concerns at the time
- Begins association with Maquis
- June 20, 2371: Arrested by Cardassian forces following hijacking of USS Defiant, strikes against Cardassian outposts and vessels (DS9: "Defiant")
- Sentenced to Lazon II penal colony (DS9: "Defiant")