Cast & Crew
Howard St. John
In a government building near Washington, D.C., counterspy David Harding receives a telephone call from Don Martin, one of his men, who is stationed near Cretona, a small southwestern city located in the desert. Cretona's main business is the production of guided missiles, which will form the first line of defense against an enemy attack. Don leaves a message for Harding, reporting that he has learned who is responsible for a security leak but will not name the person until his investigation is complete. A short time later, his body is found, an apparent suicide. Before he leaves for Cretona, Harding dispatches Robert Reynolds, an operative, to watch the people at Don's funeral, and Reynolds spots a man whom he cannot identify. Later, Harding's men decide to perform their own autopsy on Don's body, but when they sneak into the graveyard that night, a man is already there. He is soon identified as Simon Langton, Harding's British counterpart. The private autopsy reveals that Don was murdered. In order to discover Don's killer, Simon takes over his job. When Karen Michele, Don's secretary, asks Simon for a transfer, Simon refuses to accept it. Later, Karen visits Dr. Victor Gilbert, who, while pretending to help her overcome her experiences in a concentration camp, drugs her and tape records her answers to his questions about the new missiles. After Karen leaves, the recording is picked up by a water delivery man and mailed to Argentina. The water company is a front for an organization of spies, headed by a man named Miller. Suspicious of Gilbert, Harding's men surreptitiously obtain his fingerprints and check his record. Meanwhile, Reynolds tries to identify the man who attended Don's funeral. The man works with the spies, and Reynolds' questioning spurs Miller to eliminate him. Later, Harding's group learns that Gilbert is really Hugo Boren, an immigrant, and that he is not registered with any medical society under either name. Meanwhile, Simon takes Karen out, trying to find out why she has been visiting Gilbert. She discloses that she was engaged to Don and explains that both she and Barbara Taylor, Gilbert's nurse and accomplice, were displaced persons. After Simon leaves Karen's apartment, he phones Harding from a booth. Unknown to Simon, the spies have discovered that he is a federal agent, and one of them strikes up a conversation with Simon when he leaves the booth. Later, a car tries to run Simon down, but he dodges the car and kills the man, then goes into hiding to convince the spies that their plan has succeeded. The following day, Colonel Kilgore, Karen's superior, tells her that Simon is in a coma and appoints her the section's temporary chief. In the meantime, Harding's team sets up a watch on Gilbert's house. Karen witnesses the tests performed on the new missiles, and later, leaves for her appointment with Gilbert. While she is on the way, Simon dons a disguise and enters Gilbert's waiting room. Barbara penetrates his disguise, however, and warns Gilbert. After giving Simon an injection, Gilbert locks him in a room and prepares to leave the house for good. Simon manages to escape and signals Harding, whose men surround the house. Simon reveals that the tape is hidden on the water delivery truck, and the entire gang of spies is captured. Later, Simon marries Karen and returns with her to England.
Howard St. John
Howard St. John previously appeared as "David Harding" in the 1950 Columbia production David Harding, Counterspy, which was directed by Ray Nazarro (see AFI Catalog of Feature Films, 1941-50).