The first manned expedition to Mars is invaded by an unknown life form, which stows away on the rescue ship.
Marshall Thompson
Carruthers
Shirley Patterson
Ann Anderson
Kim Spalding
Van Heusen
Ann Doran
Mary Royce
Dabbs Greer
Eric Royce
Paul Langton
Calder
Robert Bice
Purdue
Richard Benedict
Bob Finelli
