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 together by Robert S. Baker and Monty Berman, the same team who’d later collaborate on the UK TV series The Saint. Rod Cameron stars as an American private eye, stationed in London. For the sake of a murdered friend, the detective takes over the dead man’s case, which turns out to have international ramifications. The villains are members of a phony pacifistic society, all of whom harbor plans for taking over the world.

When police inspector Gerald Blake wants to infiltrate a London stolen-goods gang, he does a thorough job of it. First, he robs a jewelry store, gets caught and is sentenced to prison. Then he teams up with gang-member Joey to make their escape. Once in the gang, Blake identifies the boss, Larry, and most of the other thieves, but not the "inside man." As a big fur job looms closer, the detective's task is complicated by the playful but seductive advances of Judy, a dazzling blonde who happens also to be the jealous Larry's girl friend.

A blind man is witness to a murder; later cured of his blindness he attempts to puzzle out the solution to the crime.

An English aristocrat and an American millionaire come together to tackle crime.

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