While watching for a planet that may collide with earth, scientists stationed in Scotland are approached by a visitor from outer space.

An escaped killer hides out by forcing a travelling family to take him with them.

A dashing ex-officer in His Majesty’s army, Captain Adam Corbett (Calhoun) becomes embroiled in intrigue when he agrees to escort Colonel Wilfred...

A serial killer is murdering women in the Whitechapel district of London. An American policeman is brought in to help Scotland Yard solve the case.

Caught in a loveless marriage, Dr. John Winnington (Ronald Howard) can't stop himself from falling for his wife's (Mary Laura Wood) younger sister,...

A police inspector (Donald Sinden) tracks down Russian anarchist Peter the Painter (Peter Wyngarde) and his gang in circa-1911 London.

A chance photograph may reveal a murderer's identity - and someone's after the photographer!

After being consulted by a friend concerning a murder case, a private eye learns the friend has become the next victim. Passport to Treason was put...