Episode list

Dr Travers sets out to investigate the effects of stress but must find the right person as a subject for a complicated - and potentially dangerous - experiment.

Research by Dr Ralph Cox has cast doubts on the safety of a well-known drug. But with vast commercial interests at stake, he finds it hard to get his results published.

A sequence of alarming events at R3 causes Fratton to regret his earlier curt dismissal of a local reporter's questions.

Questions are asked when Dr Frank Hillman wants to give up his post and join R3 - but as a scientist, why shouldn't he?

Young scientist Dr Wilmer tests a newly discovered substance on himself and suffers bizarre hallucinations.

R3 staff join an international scientific conference.

A birthday celebration teaches May Howard Morton and Travers a lot about themselves and each other.

A crucial time for R3's deputy director, Dr George Fratton.

Helicopters have been crashing - but no fault can be found with either men or machine.

A man returns from outer space. Is there something wrong with him? And of so - what?

Dogged by cash problems at home and at work, Travers is offered a means of solving both.