American scientist Dr. Frank Smith is brought to Britain to help the C.I.A. There is a defecting East block scientist they want him to debrief. The commies are less than amused and set Dr. Smith up for a murder.
Mary Randall, Q.C.

Dr. Frank Smith

Eve Trent

Yvonne Delbeau

Telephonist

Jim Kennedy

Bernie

Professor Horvard

Hobbs
John Castle

Judge

Baker

Jury Foreman
Cross
Bellamy

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Court Clerk (uncredited)

Liftman (uncredited)

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Courtroom Spectator (uncredited)

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Man in Hotel Lobby (uncredited)
George Fraser (uncredited)

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