Cast
Adm. Harriman Nelson
Dr. Susan Hiller
Lt Cathy Connors
Comm. Lucius Emery
Capt. Lee Crane
Miguel Alvarez
Lt (j.g.), Danny Romano
Dr. Jamieson
Vice-Adm. B.J. Crawford
Congressman Llewellyn Parker
Dr. Zucco
Crew member
Seaman Jimmy «Red» Smith
CPO Gleason
Seaman KowskiCookie Crew member 
Sparks
Seaman George YoungCrew Member, not listed in credits 
UN Commentator, not listed in creditsCrew Member, not listed in credits 
Pilot of the Seaview, not listed in creditsLt. Hodges, not listed in credits Italian Delegate, not listed in credits Dr. Newmar, not listed in credits Crew Member, not listed in credits 
UN Chairman, not listed in credits
Ned Thompson, not listed in creditsCrew Member, not listed in credits 
