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