A family of four are about to die in a car crash when the mother, father, and son become travelers. Charlotte, the daughter, retains her identity when the team's historian's transfer misfires, so MacLaren sends her to stay with her grandparents until the others complete their mission. Trevor, Carly, Marcy, and Philip are abducted and interrogated about the future until Carly kills their guard. David alerts MacLaren when Marcy does not come home, who is able to find and rescue the team with Officer Boyd. MacLaren was forced to cancel the team's mission with the family team, and Carly speculates this was their unidentified captor's goal.
The first season of Travelers has a score of 100% on Rotten Tomatoes based on nine reviews with an average rating of 8.0/10. Neil Genzlinger, writing for The New York Times, described the first season as "tasty", and "enjoyable science fiction", with "some attention-grabbing flourishes and fine acting". Hanh Nguyen, writing for IndieWire, describes the series as "fun and freaky," finding the series' appeal "in how the core group of five travelers adjust to life in our present," noting the "human nature in the travelers". Lawrence Devoe, of TheaterByte.com, called the series "tautly paced and suspenseful" with "well-developed characters", declaring that "Brad Wright has a real knack for creating futuristic series". Evan Narcisse, reviewing the first five episodes for io9, appreciated the moral dilemmas offered by the series premise and the awkwardness presented by the characters' interactions with their hosts' friends, colleagues, lovers, or caretakers: "This is a superhero show in double disguise, offering up clever explorations of the secret identity concept that touch on the guilt and contortions that come with living a double life." Netflix announced that the series was one of its "most devoured" series in 2017.