Main •
Eric McCormack as Grant MacLaren (Traveler 3468), the team's leader, who assumes the life of a married
FBI special agent •
MacKenzie Porter as Marcy Warton (Traveler 3569), the team's medic, who assumes the life of an
intellectually disabled woman •
Nesta Cooper as Carly Shannon (Traveler 3465), the team's
tactician, who assumes the life of a stay-at-home single mother •
Jared Abrahamson as Trevor Holden (Traveler 0115), the team's engineer and one of the oldest humans ever, who assumes the life of a high school athlete •
Reilly Dolman as Philip Pearson (Traveler 3326), the team's historian, who assumes the life of a college-age
heroin addict •
Patrick Gilmore as David Mailer, Marcy's
social worker and later romantic interest
Recurring • J. Alex Brinson as Jeff Conniker, Carly's abusive police officer ex-boyfriend and the father of her son, later Traveler 5416 and, briefly, Traveler 001 •
Leah Cairns as Kathryn "Kat" MacLaren, Grant's wife who works as an interior designer •
Enrico Colantoni as Vincent Ingram, the first traveler (Traveler 001) whose host was supposed to die on
September 11, 2001 • Chad Krowchuk as Simon, Traveler 004, a specialist who set up the travelers' communications system in the 21st, then was deceived into building consciousness transfer technology for Vincent •
Arnold Pinnock as Walt Forbes, MacLaren's partner at the FBI, later a member of the Faction posing as Traveler 4112 and, subsequently, Traveler 4991 •
Jennifer Spence as Grace Day, Trevor's high school counselor and later Traveler 0027, a programmer who helped create the Director •
Ian Tracey as Ray Green, Philip's lawyer and later friend, a compulsive gambler •
Kimberley Sustad as Joanne Yates, MacLaren's new FBI partner who is later assigned by the FBI director to act as the liaison between the FBI and the Traveler program
Guest Introduced in season 1 •
David Lewis as Major Gleason, a hotheaded military officer •
Kyra Zagorsky as Dr. Delaney, a brilliant scientist who developed a method for collecting and storing
antimatter •
Garry Chalk as Detective Gower, a police detective who suspects Philip of criminal activity • Kristine Cofsky as Victoria Boyd, Traveler 3185, who assumes the life of a police officer • Giacomo Baessato as Private Wilson, a soldier who works for Gleason • Alyssa Lynch as Rene Bellamy, a high school student and Trevor's girlfriend •
Tom McBeath as Ellis, Traveler 0014, a programmer who assumes the life of a farmer •
Eileen Pedde as Mom, a traveler who assumes the role of a mother in a family of four • Yasmeene Ball as Charlotte, a misfire traveler historian; later a traveler assassin • Glynis Davies as Jacqueline, a representative of
Child Protective Services •
Melanie Papalia as Beth, an FBI analyst working for MacLaren •
Karin Konoval as Bloom, Traveler 0117, a high ranking traveler engineer •
Louis Ferreira as Rick Hall, a jaded traveler team leader •
Douglas Chapman as Luca Shun, Traveler 2587, a member of Hall's team •
Jason Gray-Stanford as Aaron Donner, Traveler 4022 (and later Traveler 4024), a bomber • William MacDonald as Gary Holden, Trevor's father •
Teryl Rothery as Patricia Holden, Trevor's mother •
Dylan Playfair as Kyle, a friend of Trevor, later historian Traveler 5532 • Gerard Plunkett as Ted Bishop, a
congressman • Matthew Kevin Anderson as Derek, Traveler D13, a traveler doctor assigned to save MacLaren • David Raynolds, introduced as foster child Aleksander (episode of the same name), returns as a guest in Season 3's "Protocol 3"
Introduced in season 2 •
Stephen Lobo as Agent Wakefield, a faction member posing as a traveler who is later overwritten by the Director •
Paloma Kwiatkowski as Abigail Paris, a young woman that Trevor befriends •
Lee Majdoub as Dr. Barker, a doctor with a romantic interest in Marcy •
Sunita Prasad as Blair, David's girlfriend •
Melissa Roxburgh as Carrie, Travelers 5001–5007, a skydiver assigned to prevent the assassination of MacLaren's team •
Amanda Tapping as Katrina Perrow, Traveler 001's psychologist, who is later taken over by 001 before the Director can overwrite him •
Stephanie Bennett as Jenny, Traveler 4514, a traveler assigned to help Philip with his heroin addiction • Josh Blacker as Agent Callahan, a Traveler who assumes the life of an FBI agent
Introduced in season 3 •
Benjamin Ratner as Ivon Teslia, a computer engineer responsible for the creation of the
artificial intelligence (AI) Ilsa •
Rebecca Shoichet as the voice of Ilsa, the AI hosting the Director in the 21st century •
Magda Apanowicz as Dawn, a Faction traveler loyal to Traveler 001 •
Christopher Heyerdahl as Andrew Graeme (Traveler 7189), a mathematician whose host is discovered to be a serial killer • Veronika Hadrava as Katrina (Traveler A18), an Archivist • Karen Holness as Samantha Burns, a physicist responsible for designing the singularity engine ==Episodes==