Dr. Tremayne is an enigmatic psychiatrist running an asylum that houses four very special cases. Visited by his colleague Nicholas, Tremayne explains his amazing and controversial theories as to why each of the four patients went mad.

Two rival gangs are trying to fix horse races and a jockey is attacked and left for dead in a stage-managed car crash. An insurance investigator makes routine enquiries into the "accident" and one of the gang leaders feels threatened by this and takes counter measures.

A gang of jewel thieves rob a house which has just become empty following the recent death of it's rich lady owner. The robbery is not a complete success and one of the gang hides the jewels in the house as he's about to be captured. Later the house is put up for sale and events lead the estate agent to conclude that the jewels may still be there.

A wealthy, fatherless British clan kidnaps bums and hippies and forces them to participate in an elaborate role-playing game in which they are the perfect family; those who refuse or attempt escape are ritualistically murdered.

Prudence Hardcastle is on the pill. So is her sister-in-law, but someone has been swapping aspirin for their pills. Is it the teenage niece, the maid, the chauffeur, a lover, Prudence's husband Gerald, or all of the above?

A politician is set up by his secretary and blackmailed by her brother.

Routine tests on a traffic accident victim lead to shocking discoveries when the man's blood is found to be unidentifiable and x-rays reveal a disc embedded in his brain. His fabulous tale of being an escaped prisoner from an alien spaceship takes a turn for the sinister when the hospital staff realise that they're under a state of siege...

A wealthy, fatherless British clan kidnaps bums and hippies and forces them to participate in an elaborate role-playing game in which they are the perfect family; those who refuse or attempt escape are ritualistically murdered.

Dr. Tremayne is an enigmatic psychiatrist running an asylum that houses four very special cases. Visited by his colleague Nicholas, Tremayne explains his amazing and controversial theories as to why each of the four patients went mad.

Prudence Hardcastle is on the pill. So is her sister-in-law, but someone has been swapping aspirin for their pills. Is it the teenage niece, the maid, the chauffeur, a lover, Prudence's husband Gerald, or all of the above?

A fraudster is arrested for stealing a large sum of money from his partners. When he learns that a particularly brilliant barrister will lead the prosecution against him he sets out to undermine the credibility of the barrister.