A medical scare keeps James's feet firmly on the ground, Siegfried and Carmody get their wires crossed over an animal, Helen assists an old family friend, and Mrs Hall tries to help the war effort.

James goes on a crash course in fatherhood. Mrs Hall referees between Siegfried and the overly officious Mr Bosworth. Helen is concerned about the influence of Jenny's new friend.

It's baby Jimmy's Christening Day. There's a surprise announcement from Tristan, and Siegfried makes a promise to himself that he might struggle to keep.

Tristan and Carmody can't see eye to eye, but a quest to Pumphrey Manor might just bring them together. Helen tries to support James when unresolved feelings resurface.

Carmody gets an opportunity he shouldn't turn down. Mrs Hall and Mr Bosworth clash over a warden task. Siegfried and Carmody are forced to pay attention to their romantic pursuits.

James has a bout of brucellosis, bringing buried emotions to the surface. A broken-down car forces Siegfried and Tristan to renegotiate their relationship, with amusing consequences.

Mrs Hall's world is rocked by concerning news. Meanwhile, Tristan is given a special wartime mission involving pigeons, and the house readies to celebrate Jimmy's birthday.