Scott Bairstow

as Cliff Truckee

Steve Burton

as Steve Russell

Vicellous Shannon

as Keith Maddox

Alex Burns

as Alex Kosegin

Bianca Kajlich

as Sharon Exler

Michael Peña

as Douglas Cepeda

Tammy Townsend

as Maria Velez

Terry O'Quinn

as Cliff's Father

Greg Serano

as Garza

Lana Parrilla

as Female Series Commander

Keith David

as Gunnery Sgt. Brinkloff