The Land Unknown (1957)

Director: Virgil W. Vogel

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.

Cast

Jock Mahoney

Commander Harold 'Alan' Roberts

Shirley Patterson

Margaret 'Maggie' Hathaway

William Reynolds

Lt. Jack Carmen

Henry Brandon

Dr. Carl Hunter

Douglas Kennedy

Capt. Burnham

Phil Harvey

Machinist's Mate Steve Miller

Kenner G. Kemp

Officer at Briefing / Officer on Ship (uncredited)

Bing Russell

Radio Operator (uncredited)

Bert Stevens

Officer at Briefing (uncredited)

Tom Coleman

Man at Briefing (uncredited)