Clegg hears his new neighbor - retired milkman Luther 'Hobbo' Hobdyke - has strong links to MI5 and the secret service. Although he recalls his adventurous past as a spy to Alvin and Entwistle, they know him better for not having been a particularly good milkman - but Hobbo insists the dairy work was merely a therapeutic measure to alleviate combat stress.
While Morton is still depressed over his divorce, Hobbo attempts to find a good friend for him. Meanwhile Barry is depressed to find that Toby is moving next door to him and cements ill-will when he breaks Toby's lamp.
Adopted as a baby, Hobbo is determined to trace his natural mother. He has found out her name and exactly where she lives, but how should he approach the poor woman to tell her the good news? Meanwhile, Howard is in trouble when Marina, on finding out that he has been making inquiries about another woman, turns up at his house. As Hobbo passes Howard's house, he makes an astonishing discovery.
Howard is unnerved by Pearl's unexplained Day Outings with Nellie. Hobbo helps to follow them in order to find out once and for all. But Howard finds the answer more troubling than the question and must intervene disguised as a mobster to give his presence some clout- driven in Entwhistle's pickup.
In order that Hobbo can find out more about Nelly, his supposed mother, he has Howard eavesdrop on her when she is visiting Pearl. Realizing what Howard is up to, the women plant a completely false story about Hobbo's father being a hippie.