In the episode, the despised DCI Roy Slater returns to Peckham and arrests the Trotters for stealing a microwave.
Roy Slater, a duplicitous, mean-spirited police officer and hated ex-schoolmate of Del Boy, has returned to Peckham, where he has been tasked with tracking down a stolen microwave.
He meets Trigger and Boycie – both uncomfortable by his return – in the Nag's Head, and announces that he has recently been promoted to Detective Inspector.
Del, Rodney, and Grandad are interviewed separately, giving vastly differing descriptions of the man in the market, disagreeing on height, age and ethnic group.
He tells them of his predicament, explaining he has no choice but to co-operate, with he and Rodney facing the possibility of long prison sentences and Grandad being uncared for on the estate.