Private eye gets killed and has a clue in his hat and

A private eye has his ear bitten off in a fight, and so sets up as a 'hearing impaired' detective.

A murderer realizes he left an important clue at the scene of the crime...

Dick Nicely is gunned down in the comfort of his own home. As he lies there bleeding all over his floorboards, Nicely recalls the case that led to his death: a tail job for a classy dame named Brigid Astor, who thought her husband was stepping out on her. Turns out the husband ain't the adulterous type and the dame ain't so classy. But then, Brigid has her own story to tell: a deadly ride through the post-war underworld of gangsters, showbiz and forbidden love. It seems that all the players want to get their hands on a mysterious and elusive briefcase. But what's inside, and more importantly what's it worth?

At a party in the 40s, one of the attendees is mysteriously killed. Now, the detective must discover who killed the attendee.

Potts, the detective, with his pupil, Pan, are called by a mother to save her child. They go to the spot, accompanied by their hound, in a dog grip, and find the broken-hearted mother, who gives them a shoe and a little shirt as the only means of identifying her child. They see the cub reporter, who has been sent to the neighborhood on a lost child story, and think that she is the kidnapper. Potts enters the saloon, after he sees the reporter enter. She has gone to report on the telephone to her editor. Potts holds up the whole room, and then he and Pan proceed to search the premises. One particularly large person threatens them with a bungstarter. While Pan is waiting for Potts, he scrapes acquaintance with the reporter. When the detectives return from their fruitless search they see the big fellow playing the piano. The distracted mother comes in, and seeing the piano player she recognizes him as her child. Potts takes one look at the tiny shoe and the shirt and gives up the case.

A private detective and his young assistant solve crimes.

The lord and lady of a capacious manor are killed, and the lord's ghost seems to have returned to knock off the staff one by one, causing Inspector Winship and Dr. Tart to investigate the wacky house and its inhabitants.

After being punched in the nose, Sach finds out that he has the ability to read minds. Slip and the gang start up a detective agency try to cash in on Sach's new powers.

A detective is on the verge of revealing the identity of an elusive criminal. At the crucial moment, hedrops dead, the victim of foul play. A revolutionary electric devise is utilized to bring the detective back to life long enough for the successful completion of his mission.