Main •
Arnold Schwarzenegger as Luke Brunner •
Monica Barbaro as Emma Brunner •
Milan Carter as Barry, the CIA technical operations officer of Luke's team •
Gabriel Luna as Boro Polonia (season 1), a powerful arms dealer •
Fortune Feimster as Roo, a CIA operative on Luke's team •
Travis Van Winkle as Aldon, a CIA operative on Luke's team •
Fabiana Udenio as Tally Brunner, Luke's ex-wife and Emma's mother •
Jay Baruchel as Carter, Emma's boyfriend who is a kindergarten teacher •
Barbara Eve Harris as Dot (season 1; guest season 2), a regional CIA director who tasked Luke and Emma to work together as a team •
Aparna Brielle as Tina, the
NSA data analyst brought in to support Luke's team •
Andy Buckley as Donnie, Tally's boyfriend •
Guy Burnet as Theodore "Theo" Chips (season 2), a former MI6 agent who works with Greta and is interested in Emma romantically •
Carrie-Anne Moss as Greta Nelso (season 2), a former East German spy who had a romantic past with Luke
Recurring •
Devon Bostick as Oscar, Luke and Tally's son and Emma's brother • David Chinchilla as Cain Khan (season 1), Boro's right-hand man • Stephanie Sy as Sandy, Oscar's wife •
Scott Thompson as Dr. Pfeffer, the operational psychologist that Dot brought in to conduct Luke and Emma's mandatory joint therapy sessions •
Adam Pally as The Great Dane •
Enrico Colantoni as Reed (season 2), the interim regional CIA director replacing Dot
Notable guest stars •
Tom Arnold as Norm Carlson, a CIA torturer •
Kevin McDonald as Todd Demps, an activist scientist •
Old 97's, performing one of their own songs, portrays the house band in Tallinn when Emma and Chips dance == Episodes ==