Andre Braugher Capt. Marcus Chaplin Actor Scott Speedman XO Sam Kendal Actor Daisy Betts Lt. Grace Shepard Actor Dichen Lachman Tani Tumrenjack Actor Daniel Lissing SEAL Officer James King Actor Sahr Ngaujah Mayor Julian Serrat Actor Camille de Pazzis Sophie Gerard Actor Autumn Reeser Kylie Sinclair Actor Jessy Schram Christine Kendal Actor Robert Patrick Master Chief Joseph Prosser Actor Michael Ng Guest Star Daniel Bess Guest Star Kasim Saul Guest Star Jason Quinn Guest Star Mary Gutzi Guest Star Shawn Ryan Executive Producer, Writer Karl Gajdusek Executive Producer, Writer Martin Campbell Executive Producer, Director Marney Hochman Executive Producer