Episode list

While shopping in a local supermarket, Frank Marker sees an old woman drop (Mrs Stuart) a tin into her bag rather than her shopping basket. This is noticed by another woman customer who reports it to a shop worker. Frank deliberately collides with Mrs Stuart and knocks her bag to the floor spilling out the tin, thus avoiding a possible prosecution. Mrs Stuart invites Frank to her home where he notices an old silver box on her mantlepiece. Meanwhile Gerald Gurney-Stuart (Mrs Stuart's son, played by Barry Foster) is trying to get money for his company. Gerald and wife (patricia) call around to his mother to take her out and end up in the same Indian restaurant that frank is in with his landlady. When Gerald goes back to his mother's home says he will take the valuable silver box away to have it repaired, but he tries to sell it. Gerald's wife Patricia contacts asks Frank to make sure her husband isn't up to no good. Frank finds the Silver box in an antique shop and almost gets arrested by Det. Insp. Fairbanks (Ray Smith), who wants to know why frank is interested in this box. Frank is questioned but released and on visiting Mrs Stuart, finds out that Gerald 'borrowed' it to get it repaired. Frank visits Gerald and thinking Frank is trying to blackmail him and so calls the police and admits to everything.

Things are looking up. Marker is invited to join an enquiry agency. But why should they wish to employ a man with a record?

Marker is hired to find out who is making threatening phone calls to a woman living alone. His furtive observations bring unexpected results.

Framed. Marker, hired to watch the antics of a wayward husband, finds himself hooked up in a very unusual affair of the heart.

A routine request to find a missing husband seems fishy to Marker, but he has no idea of the danger his inquiries will provoke.

The ladies of Cheviot House have sharp tongues, as Marker finds out to his cost when his client Rose Mason sets them wagging.

His latest assignment leads Marker into the centre of a family squabble over who gets what, from whom.

Marker finds himself at the centre of hypocrisy and villainy when he is hired to look after a client's welfare.

When Mrs Meadows finds the photograph of a beautiful young girl in her husband's wallet, Marker is contacted - and receives a surprise from what he uncovers.

A case full of surprises - the kind Marker enjoys. This time it appears as though his interests and those of DI Firbanks are the same - but are they?

Marker must sort out a fascinating case involving a streetwise old reprobate and a young American visiting Britain.

When Marker takes on an investigation he'd rather be without. He finds himself manipulated by several people - including DI Firbank.

Faced with a head-on collision with DI Firbank, Marker is more determined than ever to get to the bottom of his latest investigation.