Murders take place and each crime is similar to the last. One person must have committed them; but who? Another attack. The victim survives but has amnesia and is the only person who can make an identification. A suspect is arrested.

Hardy is trying to piece together the burnt pieces of paper found in the suspect's room. Jo has been asked to try and break the surviving victim's amnesia by hypnosis. The suspect is questioned at length. The case builds up against him.

A smashed lock, a bloodstained jacket, a drifting boat and a takeover bid. Dr. Hardy with the aid of a few bright feathers and silk thread solves the mystery of a disappearing man.

When violent death strikes down a pretty farm girl, Dr Hardy and Inspector Fleming come up against a wall of stubborn reserve. Persistence at last brings Dr Hardy to a 'not inconsiderable suspicion' of the killer's identity. But proof.

Illegitimate babies present problems. Bringing one up in an atmosphere of disapproval can be harder than the alternative. To some, the decision is easy; a matter of practical common sense. To others it's life and death.

A man is found guilty of murdering his wife and sentenced to life imprisonment - could he be innocent? Unquestionably, the facts prove him guilty. Or do they?

Estate Duties - a curse to be avoided? When a businessman is found drowned it could mean ruin for his family.

That little Lucille died a violent death was certain; how she died was more obscure. Dr. Hardy's painstaking research and insistence on accuracy finally establishes the truth.

Protection: you can refuse to pay, you can go to the police for their protection - or you can stand the risk yourself.

A grocer, Harry Kirby, lies dead - poisoned, electrocuted, and gassed. If suicide can be established, surely this is gilding the lily. Why was a large sum of money found laid out neatly beside the body? And if it wasn't suicide.

An old man relies upon his daughter to look after him during convalescence but she has her own life to lead.

A hospital ward is destroyed by fire. Could it be deliberate - and if so, who would want to burn down a hospital and why?

There are classic symptoms of strychnine poisoning when a wealthy landowner dies after eating a trout, freshly caught, the question is who poisoned him? And how?

Jo's car is run off the road by a lorry. The driver may be guilty of dangerous driving. Dr Hardy receives a letter threatening his wife's life and demanding he change his evidence. Hardy refuses but it is at the risk of his wife's life.

Dr. Hardy is involved in tracing a ruthless psychotic killer who is employed by the accused in an attempt to suborn witnesses. He is determined to give his evidence, but the police issue firearms to protect his life.

A doctor may reasonably diagnose a brain tumour as the cause of death of his first wife. But when his second wife dies in similar circumstances and both are known to have been wealthy women.

A woman lies dead in a country road, apparently the victim of a hit-and-run driver. But something doesn't quite fit. She lived in the town. Why would she be in the country at that time - in those shoes? And what about the tyre marks?

A man is shot three times in front of witnesses. When the police arrive there is no body. Has he been shot? Is he really dead?

Eddie spends much of his time in a betting shop. After a win of forty pounds he is found strangled in his own home. His grandson, who lived with him, is missing. Why is he trying to leave the country with forty pounds in his pocket?

While its owner is on holiday an abandoned dog wanders the streets and becomes savage, causing the death of a derelict meths-drinker. Could there be some similarity in the lives of man and dog?

Why should a businessman crash into a bridge support at 80 m.p.h.? When the post-mortem reveals him to have died as a result of the impact, and not from physical causes. What other reason could there be for the accident?

Drug addiction is an increasing problem in our society. In the first episode of a two-part story, the hopelessness of the addict is matched against the efforts of doctors to control the terrible effect of the drug.

It is said that drug addicts make poor parents. How do a young couple, both of whom are addicts, cope with attending to the needs of their small baby?

Once a man suspects that his 10-year-old son is not in fact his, he cannot rest until he has discovered the truth.

Threatening suicide is often a cry for help, sometimes that cry is heeded, sometimes assistance is too late.