Commander Harold 'Alan' Roberts
Jock Mahoney
Commander Harold 'Alan' Roberts

“BEHIND A BARRIER OF ANTARCTIC ICE... A PARADISE OF HIDDEN TERRORS!”
Navy Commander Alan Roberts is assigned to lead an expedition to Little America in Antarctica to investigate reports of a mysterious warm water inland lake discovered a decade earlier. His helicopter and its small party, including reporter Maggie Hathaway, is forced down into a volcanic crater by a fierce storm. They find themselves trapped in a lush tropical environment that has survived from prehistoric times.
The Land Unknown ≣ 1957 ≣ Trailer
Commander Harold 'Alan' Roberts
Jock Mahoney
Commander Harold 'Alan' Roberts
Margaret 'Maggie' Hathaway
Shirley Patterson
Margaret 'Maggie' Hathaway
Lt. Jack Carmen
William Reynolds
Lt. Jack Carmen
Dr. Carl Hunter
Henry Brandon
Dr. Carl Hunter
Capt. Burnham
Douglas Kennedy
Capt. Burnham
Machinist's Mate Steve Miller
Phil Harvey
Machinist's Mate Steve Miller
Officer at Briefing / Officer on Ship (uncredited)
Kenner G. Kemp
Officer at Briefing / Officer on Ship (uncredited)
Radio Operator (uncredited)
Bing Russell
Radio Operator (uncredited)
Officer at Briefing (uncredited)
Bert Stevens
Officer at Briefing (uncredited)
Man at Briefing (uncredited)
Tom Coleman
Man at Briefing (uncredited)
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