The Season One Cast includes 10 starring cast members and numerous guest stars.
Starring[]
- Andre Braugher as Captain Marcus Chaplin
- Scott Speedman as XO Sam Kendal
- Daisy Betts as Lieutenant Grace Shepard
- Camille De Pazzis as Sophie Girard
- Dichen Lachman as Tani Tumrenjak
- Daniel Lissing as SEAL Officer James King
- Sahr Ngaujah as Mayor Julian Serrat
- Autumn Reeser as Kylie Sinclair
- Jessy Schram as Christine Kendal
- and Robert Patrick as Master Chief Joseph Prosser
Guest starring[]
- Matt Gerald as SEAL Officer Gil Langston
- Omid Abtahi as Nigel
- Max Adler as Seaman Stern
- David Rees Snell as SEAL Harper
- Michael Ng as Sonar Operator Cameron Pitts
- Jessica Camacho as Seaman Pilar Cortez
- Will Rothhaar as Seaman Josh Brannan
- with Bruce Davison as Admiral Arthur Shepard
Co-starring[]
- Daniel Bess as Lieutenant Chris Cahill
- Darri Ingolfsson as Robert
- Isaac Gilmore as Fisher
- Jason Quinn as Seaman Jones
- Kamakani de Dely as an Armed Marine
- Mary Gutzi as Dodds
- Kasim Saul as Seaman Lawrence
- Robert Egbert as the Weapons Officer
Uncredited[]
- Unknown as the SEAL medic
- Unknown as Seaman Henry
- Unknown as Seaman Reynolds
- Unknown as News Reporter 1
- Unknown as the National Command Officer
- Jay Karnes as William Curry
- Unknown as News Reporter 2