Cast

• Robert Montgomery
  Robert Montgomery (actor)
  Robert Montgomery was an American actor and director.- Early life :Montgomery was born Henry Montgomery, Jr. in Beacon, New York, then known as "Fishkill Landing", the son of Mary Weed and Henry Montgomery, Sr. His early childhood was one of privilege, since his father was president of the New...
  
   - Narrator (voice) (as Comdr. Robert Montgomery, U.S.N.R.)
• Robert Taylor
  Robert Taylor (actor)
  Robert Taylor was an American film and television actor.-Early life:Born Spangler Arlington Brugh in Filley, Nebraska, he was the son of Ruth Adaline and Spangler Andrew Brugh, who was a farmer turned doctor...
  
   - Narrator (voice) (as Lt. Robert Taylor U.S.N.R.)
• Van Heflin
  Van Heflin
  Emmett Evan "Van" Heflin, Jr. was an American film and theatre actor. He played mostly character parts over the course of his film career, but during the 1940s had a string of roles as a leading man...
  
   - Narrator (voice) (as Lt. Van Heflin, A.A.F., Ret.)
• James Forrestal
  James Forrestal
  James Vincent Forrestal was the last Cabinet-level United States Secretary of the Navy and the first United States Secretary of Defense....
  
   - Himself (as James V. Forrestal)
• Chester W. Nimitz - Himself
• Rear Admiral Richard E. Byrd - Himself (as Admiral Byrd)
• Richard Cruzen - Himself (as Admiral Cruzen)
• Robert S. Quackenbush - Himself (as Captain Quackenbush)
• George J. Dufek
  George J. Dufek
  George John Dufek was an American naval officer, naval aviator, and Arctic expert. He served in World War II and the Korean War and in the 1940s and 1950s spent much of his career in the Antarctic, first with Admiral Byrd and later as supervisor of U.S. programs in the South Polar regions...
  
   - Himself (as Captain George Dufek)
• Paul A. Siple - Himself (as Dr. Siple)
• Charles W. Thomas
  Charles W. Thomas (Captain)
  Charles Ward "Tommy" Thomas was a flag officer in the United States Coast Guard and commanding officer of the icebreakers USCGC Northland and USCGC Eastwind that served in the Greenland Patrol during World War II. In August 1945 he was appointed Commander, Greenland Patrol...
  
   - Himself (as Captain Thomas)
• Richard E. Byrd Jr. - Himself
• Vernon D. Boyd - Himself (as Captain Boyd)
• Charles A. Bond - Himself (as Captain Bond)
• David E. Bunger - Himself (as Commander David E. Bunger)
• John E. Clark
  John E. Clark
  John Edward Clark is an American archaeologist and academic researcher of pre-Columbian Mesoamerican cultures. he holds a position as professor of anthropology at Brigham Young University , and is also the director of the New World Archaeology Foundation.Clark pursued undergraduate and...
  
   - Himself (as Captain Clark)
• John D. Howell - Himself (as Commander Howell)
• William Kearns - Himself (as Lieutenant j.g. Bill Kearns)
• Ralph LeBlanc - Himself (as Lieutenant j.g. Frenchie LeBlanc)
• Henry H. Caldwell - Himself (as Captain Caldwell)
• Owen McCarty - Himself
• William Warr - Himself
• James H. Robbins - Himself (as Shorty Rogers)