A series of scientists working on a new techology to facilitate man's conquest of space are killed in mysterious circumstances. Suspicion falls on the wife of another scientist on the project, who may not be what she seems.
John Neville
Dr. Mark Davidson
Philip Stone
Prof. John Lancaster
Gabriella Licudi
Julie Davidson
Patrick Newell
Maj. Clarke
Jean Marsh
Miss Ballard
Warren Mitchell
Prof. Munro
