Set in 1942 California, Navy demolition team diver Lieutenant Kenneth M. Braden falls in love with Sally Johnson and proposes marriage. Sally hesitates, asking for more time, but Braden is soon called to a Pacific base for a classified mission. He later discovers Sally also works for the Navy and has been assigned to evaluate him for this dangerous operation. Braden boards the submarine Barracuda, commanded by Commander Paul Stevenson, and must infiltrate a Japanese-held island to photograph secret radio codes, risking everything for the mission's success. Cast: - James Garner as Lt. JG. Kenneth M. Braden - Edmond O'Brien as Commander Paul Stevenson - Andra Martin as Sally Johnson - Alan Hale, Jr. as Lt. Pat Malone - Carleton Carpenter as Lt. Phil Carney - Frank Gifford as Ensign Cy Mount - William Leslie as Lt. Doherty - Richard Bakalyan as Seaman Peck - Edd Byrnes as Pharmacist Mate Ash - Sean Garrison as Seaman Floyd - Henry Kulky as Chief Petty Officer York - Warren Oates as Seaman Kovacs Runtime: 112 minutes