The Brighton series sees Marker establish a platonic friendship with Mrs Mortimer. Although he is told that she is a widow, she later confides in him that she has a husband who left her, and who she presumes is still alive. She tells the probation service she is a widow because she feels it would be more socially acceptable for a widow to be seen to take in ex-prisoners as lodgers—an interesting comment on the social attitudes of late-1960s England. Towards the end of the series, Marker works briefly for another enquiry agent, Rylands—in "The Comedian's Graveyard" he is hired to trace a young girl who has run away from her home and is now appearing in a run-down end-of-pier theatre act. Unthinkably for the character during the ABC episodes, he invites Mrs Mortimer out for an evening at the theatre, together with the girl's aunt who has hired him. The partnership with Rylands soon splits up as Marker finds his working methods intolerable and makes it clear he thinks Rylands is less than honest with his clients.