During the Nazi occupation of Poland, an acting troupe becomes embroiled in a Polish soldier's efforts to track down a German spy.

After experimenting on himself and becoming invisible, scientist Jack Griffin, now aggressive due to the drug's effects, seeks a way to reverse the experiment at any cost.

As novice detectives, Bud and Lou come face to face with the Invisible Man.

Following a tragic accident that leaves him disfigured, crazed composer Erique Claudin transformed into a masked phantom who schemes to make beautiful young soprano Christine Dubois the star of the opera and wreak revenge on those who stole his music.

In 1903, Doctor Huntington Bailey meets a friendly older lady during a train trip. She tells him that she is going to visit her brother Nick and his lovely young wife Allida. Once in New York, Bailey hears that his train companion suddenly died. Shortly afterward, he meets the strange couple and gets suspicious of Nick's treatment of his wife.

A devoted secretary embarks on a dangerous mission to try to find the elusive woman who may prove her boss didn't murder his wife.

An Italian socialite on the run signs on as housekeeper for a widower with three children.

A beautiful temptress re-kindles an old romance while trying to escape her past during a tension-packed train journey.

While watching from her train window, Nikki Collins witnesses a murder in a nearby building. When she alerts the police, they think she has read one too many mystery novels. She then enlists a popular mystery writer to help her solve the crime on her own, but her sleuthing attracts the attentions of suitors and killers.

A classical musician from a working class background is sidetracked by his love for a wealthy, neurotic socialite.