The first episode of the fourth series, "Welcome to Brighton?" (broadcast 30 July 1969) starts with a custom title sequence giving a brief recap of Marker's offence and his prison career. The first shot is of Marker lying awake in bed with the judge's voice going through his head, passing sentence on him. It is about a year since the events of "Cross That Palm When We Come To It" and Marker has been transferred to an open prison before being released on parole to complete his sentence. He is determined not to fall into a life of crime, despite what his fellow prisoners tell him ("You've crossed over the line now, mate — you're not one of them, you're one of us!"). In the first half of the episode, Marker is released from prison and heads for Brighton where the parole system has arranged accommodation for him with a Mrs Mortimer (Pauline Delaney). Through an extensive location-shot sequence on the sea front at Brighton, the viewer experiences Marker's disorientation at a world which appears to have changed considerably since he was sent to prison. He immediately encounters the very same sort of people with whom he dealt every day in his pre-prison life; a semi-drunken encounter with a woman who tries to steal his money and using his detective skills to trace the wife of a fellow inmate from the prison he has just been released from. Marker meets his parole officer, Mr Hull (played by John Grieve) and gets a job with a local builder, Mr Kendrick.