After several coeds are murdered at a college, a professor who is having an affair with one of his students becomes a suspect. When other gruesome murders start occurring shortly thereafter, the teacher suspects that he may be the cause of them.

After a businessman's unfaithful wife is seemingly killed in a car accident, he is led by several unscrupulous characters to believe that she is actually alive.

In this German detective thriller, swindlers using a false charity as a front send a hit man around London to murder wealthy people whose deaths can benefit the organization. This film is one of a very large number of German Scotland-Yard thrillers based on the novels of Edgar Wallace.

Scotland Yard must discover why people are being murdered by a monstrous dog at Blackwood Castle.

The sister of a famous, but as yet uncaught, criminal named "The Hexer" is murdered. Inspector Higgins of Scotland Yard believes that "The Hexer" will surface to take his revenge on his sister's killers, and plans to set a trap to finally capture him. However, soon bodies start piling up, and it looks as if "The Hexer" may get away yet again.

When a wealthy man dies, his avaricious relatives look forward to inheriting all his money. However, he leaves a provision in his will that they all must spend a week together in his castle before they will be able to inherit anything. At the castle (which is cut off from the outside world), the relatives soon begin to be killed off one by one, each strangled with an Indian scarf.

A serial killer named The Shark is terrorizing London by killing his victims with a speargun and then, dressed in a scruba-diver's wetsuit, using the city's sewer tunnels to make his getaway.

A rich man bequeaths seven keys to seven of his friends, but only one will unlock the door to untold wealth.

A disfigured killer with glazed-over white eyes is doing the dirty work so that an insurance agent-doctor can get the victims' insurance money.

High school student Fabian König is kicked out of school and starts a gang that specializes in theft. He falls in love with the orphan girl Ulla, but she rejects him when she finds out how he spends his time. When the pimp Horst tries to rape Ulla, she is rescued by Fabian. Shortly afterwards, Horst's body is found and Fabian is convicted of the murder due to the false testimony of a witness. In prison, he comes to trust the prison doctor Dr. Knittel, who believes him and is able to unmask the real culprit.