ATTORI:

• Walter Pidgeon (Admiral Harriman Nelson)
• Robert Sterling (Captain Lee Crane)
• Barbara Eden (Lieutenant Cathy Conners)
• Peter Lorre (Comm. Lucius Emery)
• Joan Fontaine (Dr. Susan Hiller)
• Michael Ansara (Dr. Miguel Alvares)
• Frankie Avalon (Lieutenant Chip Romano)
• Regis Toomey (Dr. Jamieson)
• John Litel (Vice Admiral B.J. Crawford)
• Howard McNear (Congressman Llewellyn Parker)
• Henry Daniell (Dr. Zucco)
• Robert Easton (Sparks)
• Charles Tannen (CPO Mack Gleason)
• Mark Slade (Seaman Jimmy 'Red' Smith)
• Del Monroe (Seaman Kowski)
• Jonathan Gilmore (Seaman George Young)
• Anthony Monaco (Cookie)
• Skip Ward (Crew Member)
• Michael Ford (Crew Member)
• William Herrin (Crew Member (Uncredited))
• Robert Buckingham (Crew Member (Uncredited))
• Richard Adams (Crew Member (Uncredited))
• Jimmy Murphy (Crew Member (Uncredited))
• George Diestel (Lieutenant Hodges (Uncredited))
• Larry Gray (Dr. Newmar (Uncredited))
• David McLean (Ned Thompson (Uncredited))
• Edward Rickard (Officer (Uncredited))
• Charles Dierkop (Seaview Pilot (Uncredited))
• Kendrick Huxham (UN Committee Chairman (Uncredited))
• Art Baker (UN Commentator (Uncredited))
• Rodger Terry (Guard (Uncredited))
• Brad Brown (Guard (Uncredited))
• Raoul Freeman (Delegate (Uncredited))
• Al Bain (Delegate (Uncredited))
• Harry Baum (Delegate (Uncredited))
• Benjie Bancroft (Delegate (Uncredited))
• Michael Cirillo (Delegate (Uncredited))
• Harry Denny (Delegate (Uncredited))
• John Giovanni (Delegate (Uncredited))
• Bhupesh Guha (Delegate (Uncredited))
• Esther Ying Lee (Delegate (Uncredited))
• Robert Locke Lorraine (Delegate (Uncredited))
• George Nardelli (Delegate (Uncredited))
• Paul Power (Delegate (Uncredited))
• Paul Ravel (Delegate (Uncredited))
• Scott Seaton (Delegate (Uncredited))
• Leslie Sketchley (Delegate (Uncredited))
• Ray Spiker (Delegate (Uncredited))
• Hal Taggart (Delegate (Uncredited))
• Robert Strong (Delegate (Uncredited))