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.
George Brent
Tim Hanley
Ilona Massey
Carla Nillson
Basil Rathbone
Reggie Oliver
Gene Lockhart
Sidney Grenner
George Zucco
Webster
Marjorie Gateson
Bertha Grenner
Clayton Moore
Sewell
Francis Pierlot
Dr. Rowan
