Main Characters Captain Marcus Chaplin 13 main appearances Lt. Cmdr. Sam Kendal 13 main appearances Lt. Grace Shepard 13 main appearances Sophie Girard 13 main appearances Petty Officer James King 13 main appearances Kylie Sinclair 12 main appearances Master Chief Joseph Prosser 11 main appearances Tani Tumrenjak 10 main appearances Julian Serrat 10 main appearances Christine Kendal 10 main appearances
Recurring Guest Characters Sonarman Cameron Pitts 10 guest appearances Petty Officer Pilar Cortez 10 guest appearances Lt. Chris Cahill 9 guest appearances Petty Officer Barry Hopper 9 guest appearances Petty Officer Josh Brannan 8 guest appearances Paul Wells 7 guest appearances Secretary of Defense William Curry 7 guest appearances Robert Mitchell 7 guest appearances Admiral Arthur Shepard 6 guest appearances Nigel 5 guest appearances Hawkes 5 guest appearances Bennett Sinclair 5 guest appearances Seaman Jones 4 guest appearances Seaman Lawrence 4 guest appearances Senior Chief Petty Officer Harold Anders 4 guest appearances Wallace 4 guest appearances Zheng Li 4 guest appearances Fisher 3 guest appearances Boston Kowalski 3 guest appearances Dodds 2 guest appearances ⇤ « 1 2 3 4 5 » ⇥