Guest
Warren Kole as NCIS Special Agent Josh Holder
Justin Garza as Special Warfare Operator First Class Victor Ramirez, a member of Alpha Platoon
Ajay James as Senior Chief Special Warfare Operator Cortese, Alpha Platoon's Chief, tactical team leader, and advisor to LCDR James Reece.
Tom Amandes as Vic Campbell, Lauren Reece's father
Catherine Dyer as Rachel Campbell, Lauren Reece's mother
Marco Rodríguez as Marco Del Toro, a Mexican businessman and family friend of the Reeces
Sean Gunn as Saul Agnon, Vice President of Capstone Industries
Carsten Norgaard as Elias Ryberg, a prospective buyer of Nubellum Pharmaceuticals
Geoff Pierson as Senator Joe Pryor, member of Senate Appropriations Subcommittee on Defense
Patricia de Leon as Paola Del Toro, Marco's wife
Renata Friedman as Anne Howard, Captain Howard's wife
Jack Yang as Brian Buranek, Katie's brother
Nicole Steinwedell as Deborah Buranek, Katie's sister-in-law
Nate Boyer as Luke Malick, FBI HRT team leader
Remi Adeleke as Terrell "Tee" Daniels, FBI HRT operator
Derek Phillips as FBI Senior Special Agent Stephen Ramsay
Butch Klein as Marcus Boykin, a lawyer and Saul Agnon's associate
Jack Carr as Adrian Gordonis (cameo), a Marine Raider veteran and security contractor at Talos Tacticals. Jack Carr is The Terminal List's author and executive producer, as well as a former Navy SEAL officer.
Tom Hopper as Raife Hastings, former US Navy SEAL Lieutenant and Reece's friend, who family root's are from Rhodesia, and the military Selous Scouts. (season 2)
Dar Salim as Mohammed "Mo" Farooq, former Major in ISOF and CIA Contractor. (season 2)
Luke Hemsworth as Jules Landry, former CIA Officer and later Contractor. (season 2)
Shiraz Tzarfati as Tal Varon, Mossad Surveillance Agent. (season 2)
Olga Kurylenko (season 2)
Yul Vazquez (season 2)
Arnold Vosloo (season 2)
