A hospital patient vanishes before having the operation that could save her life.

Frank Dain searches for a loving wife who ran away from her husband after a note is passed to her at the racetrack.

Frank Dain becomes a homicide suspect in his girlfriend's disappearance and quits the Missing Persons Bureau in order to investigate the case.

A friend and private detective disappears while tracking down a missing heir, and Lieutenant Dain searches for him. The trail leads to New Mexico, where Dain discovers his friend has become the prime suspect in a murder after locating one of the heirs.

Dain's search for a missing priest and a missing sheriff leads him to a successful surgeon who becomes the key to the double mystery.

Dain searches for an endangered widow and her baby, runaways from her wealthy father-in-law.

The mysterious disappearance of a young writer takes Lt. Dain on a dangerous mission to a small midwestern town.

Missing: an undercover cop who was about to crack a car-theft ring.