David Main, a rising London lawyer returns to his native Leeds to take on a case defending the son of a local business tycoon, Charles Arkwright, who is facing a charge of money laundering. He is lured back by an offer to take a share in a local legal firm who had once rejected him because he was considered too ruthless and hasty but have been persuaded to take him on as they are now part-owned by Arkwright. Main is also acting for a postal worker accused of stealing items of mail in London and is having to commute between the two cities putting added stress on his already fragile marriage. In Leeds he manages to get the millionaire's son a light sentence of twelve months for a crime for which he should probably have served twelve years. On his return to London he discovers his wife has left him. Features Leslie Sands, Frederick Danner, David Lodge, Willoughby Goddard, Peter Halliday, Michael Elwyn, Arthur Hewlett and Martin Boddey.

Main is now sleeping in his London office. Two new cases come up one concerning a record company in a dispute with a former manager of a music star who claims to still hold him under contract, and the other involving the son-in-law of one of his staff accused of GBH for assaulting a man who had attacked his daughter in a park. Main takes the first case, while handing the other to Margaret, a young lawyer from the Leeds firm. Main manages to persuade the old manager to settle for £3,000 when he is informed he has absolutely no case, while Margaret manages to get her client off thanks to a surprise witness. However doubts soon begin to surface about his reliability. Meanwhile, Main's wife has hired a private detective to monitor his movements, suspecting him of an affair. Features Murray Evans, Tony Caunter, Ballard Berkeley, Austin Trevor, Walter Gotell, John Normington and John Law.

Main has been in Leeds overseeing a takeover of Kershaws, a local industrial company, by a much larger firm who want to use it to make parts for their factories. While he is there, one of the workers who is seriously ill, begins proceedings against the company because of industrial illness allegedly caused by a faulty machine. The case is being driven by Grady, a recently arrived agitator who aspires to be a shop steward. The old owner of the company wishes to offer money to the worker as part of his paternalistic loyalty to his employees, but Main insists this is unwise and the new owners agree. When the worker in question dies, his wife abandons the case - but Grady leads the workers out on strike. Fearful that this will impact on their other factories and put the entire company out of business, the parent company switches it's work to a company in Amsterdam, effectively putting all the workers at Kershaws out of their jobs. While in Leeds, Main unsuccessfully tries to seduce his secretary.

After one of Main's clients is forced to stop production at his factory because of a violation of patent held by an American company, he sues Main for negligence. Meanwhile Margaret acts for her Godmother who is locked in a dispute with a tenant at the house she owns, the first time she has appeared in court. Main's case threatens to ruin him both professionally and financially, and he mounts his defence by denying the charge. Faced with almost certain defeat, he undertakes an unorthodox gamble in a desperate attempt to save his career. Margaret is upset by her failure to win her Godmother's case. Features Liz Bamber, Aubrey Morris, Aimée Delamain, Simon Oates, David Morrell and Geoffrey Chater

Main is hired for an unusual job, which involves travelling to Cuba to negotiate for the release of a dissident held there. He soon runs into trouble with the island's authorities who are deeply suspicious of his motives and are deeply dismissive about his British legal background. He soon begins to appreciate just how distorted the Cuban legal system has become. In Leeds, Margaret takes on the defence of a woman charged with theft for failure to complete payments on her hire purchase television, a case not helped by the woman's abusive husband. She applies for a lengthy probation sentence to help give the woman greater protection. Features John Bennett, Alan Browning, Raymond Young, Lesley Nunnerley, Dorothy Gordon and David Grey.

Main is employed by a successful young businessman to seal a deal with a large American corporation. He is also asked to act in the man's divorce from his wife who he plans to separate from amicably.

A Brazilian diplomat has adopted a baby from a young Irish woman. When the Irish woman's mother discovers from her Doctor that the couple is black, she demands the baby be returned. As the formal legal documents have not been signed, she appears to have a strong legal case. This is backed up by the possibility of the newspapers taking up the campaign.

Main is called in to try and halt a planned major new high-rise housing development in Leeds, which is the brainchild of an ambitious young architect and a powerful local council leader. It's construction will mean demolishing several streets and the destruction of a long-standing community. Main pleads the case of the locals in a public inquiry, but ends the episode speculating how -----------. Features Jack Watson, Michael Collins, Peter Gilmore, John Phillips, Preston Lockwood and Hugh Morton.

Main has his hands full with a demanding client, the wealthy widow Mrs Wenn who is trying to have a neighbouring house demolished as it blocks the view from her manor house. Main initially is dismissive of her, but when it appears that an error by his firm could allow her to sue him for negligence he has to become increasingly attentive to her, something that makes Sarah jealous. Features Joan Greenwood, Nicholas Pennell, Felix Aylmer and David Blake Kelly.

Main is taken on a case of a woman who is accused of death by dangerous driving for her part in a traffic accident, committed while drunk, in which her husband and another man died. Main persuades her to plead guilty and demonstrate mitigation but a mix-up leads to her being defended by an inexperienced barrister and she receives a jail sentence and is faced with a £40,000 payout to the victim's family. Main sets about trying to help her raise the money and takes steps towards an appeal. Meanwhile Peter Finden's marriage is in trouble, and he takes an unfortunate step, which leads to him departing the firm under a cloud. Features James Copeland, Faith Brook, Hildegarde Neil, Ralph Truman and Walter Gotell.