of related episodes. Starting with "Nobody Wants To Know", Marker investigates a horse-doping racket being run by an organised criminal gang. He ignores warnings to drop the case, because he "doesn't like being bullied" but gets a serious beating-up for this. The next episode, "How About a Cup of Tea?", recalls the Brighton era as Marker comes out of hospital and his friends (including Firbank and a returning Mrs Mortimer) attempt to rally round him and cheer him up. He tries to find a career other than enquiries but is told by an unhelpful job centre clerk (Robin Askwith) that he is too old to do anything new. The episode concentrates again on Marker and how, with his friends to help him, he pulls himself out of the negative cycle of self-pity and depression. The final episode of the trilogy is "How About It, Frank?", in which he reluctantly takes revenge on those responsible for his beating up and narrowly avoids another encounter with the wrong side of the law. He enters into a partnership with another enquiry agent, Ron Gash (Peter Childs). Gash is an ex-policeman and, although much more likeable than Rylands (of the Brighton episodes) he does have very different ideas about the job from Marker. Although Marker would show interest in money if a large quantity of it appeared to be heading his way (such as "Well—There Was This Girl, You See ...") he never considers raising his fees to provide himself with a more comfortable living standard. Gash is far more profit-motivated and also considers Marker's shabby appearance to be off-putting to potential clients. Yet again Marker decides he doesn't like working with a partner, and in the episode "What's to Become of Us?" (10 February 1975) Gash and he part ways peacefully and amicably. For the final half-dozen episodes Marker relocates to Chertsey in Surrey, partly to avoid a clash of location with Gash's business. The move to Chertsey sees the series return to its traditional format of a new case each week for Marker. In "Fit of Conscience" he is asked to investigate the collapse of a residential apartment block and it becomes apparent that the concrete has been incorrectly formulated. Those responsible for this, the primary cause of the collapse, leave the country and avoid being brought to British justice for their actions. The series often produced such downbeat endings, with the