Tab Hunter

Lt. Morgan Hayes

Frankie Avalon

Seaman Joseph Malzone

Scott Brady

Capt. Emmett Carey

Jim Backus

Bosun's Mate Ed Fennelly

Gary Crosby

Seaman Floyd Givens

Michael Dante

Lt. William 'Bill' Fourtney

Jody McCrea

Seaman William Sherman

Aki Aleong

Seaman Ronald Davayo

Marc Cavell

Paul

Eva Six

Reiko

Richard Bakalyan

Seaman Hiller (uncredited)

Raymond Guth

Seaman Rich (uncredited)

Judy Lewis

Dream Siren (uncredited)

Steve Mitchell

Seaman Nolan (uncredited)

William Shatner

Narrator (voice) (uncredited)