Tim Hanley, an American agent, posing as a lawyer with the United States Embassy in London, and Reggie Oliver, a Scotland Yard detective, posing as a music critic are both keeping their eye on Carla Nillson, a famous singer, whom they suspect of espionage. They all meet in London, then in Lisbon, and eventually in New York City, where Carla sings on the radio.
as Tim Hanley
as Carla Nillson
as Reggie Oliver
as Sidney Grenner
as Webster
as Bertha Grenner
as Sewell
as Dr. Rowan
as Bruner
as Tetlow
as Sergeant Moulton
as Denby
as Sir Henry
as Desk Clerk
as Don
as Waiter
