 James GarnerMajor Jefferson F. Pike | Major Jefferson F. Pike |
 Eva Marie SaintAnna Hedler | Anna Hedler |
 Rod TaylorMajor Walter Gerber | Major Walter Gerber |
 Werner PetersOtto Schack | Otto Schack |
 John BannerErnst | Ernst |
 Russell ThorsonGen. Allison | Gen. Allison |
 Alan NapierCol. Peter MacLean | Col. Peter MacLean |
 Oscar Beregi Jr.Lt. Col. Ostermann | Lt. Col. Ostermann |
 Ed GilbertCapt. Abbott | Capt. Abbott |
 Sig RumanGerman Guard | German Guard |
 Celia LovskyElsa | Elsa |
 Karl HeldCpl. Kenter | Cpl. Kenter |
 Martin KosleckKraatz | Kraatz |
 Marjorie BennettCharwoman | Charwoman |
 Henry RowlandGerman Soldier | German Soldier |
| JJoe Di RedaAmerican Soldier | American Soldier |
 Joseph MellLemke | Lemke |
 Richard AlexanderMan Paying Respects (uncredited) | Man Paying Respects (uncredited) |
| DDick CherneyGerman Soldier (uncredited) | German Soldier (uncredited) |
 John DennisMP Sergeant Guard (uncredited) | MP Sergeant Guard (uncredited) |
 James DoohanBishop (uncredited) | Bishop (uncredited) |
 Horst EbersbergSwiss Officer (uncredited) | Swiss Officer (uncredited) |
 John HartLt. Cmdr. Perkins (uncredited) | Lt. Cmdr. Perkins (uncredited) |
 Walter JanovitzDr. Metzler (uncredited) | Dr. Metzler (uncredited) |
 Norbert SchillerDr. Wittelbach (uncredited) | Dr. Wittelbach (uncredited) |
 William SmithGuy (uncredited) | Guy (uncredited) |
| RRudy GermaneMilitary Officer (uncredited) | Military Officer (uncredited) |
| SStuart HallMilitary Officer (uncredited) | Military Officer (uncredited) |
