It is Spring 1941 and with the Second World War under way, Siegfried is taking up the slack at the surgery, while Mrs Hall and Helen are considering their contribution within the community, and Carmody is eager to step up.

James struggles with parenting baby Jimmy. Helen notices Jenny's independence. Conflict arises between Siegfried and Mr. Bosworth over safety measures. Jenny's recklessness leads to consequences. Helen allows Jenny's growth.

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 adjusts to life at Skeldale, but the new vet, Carmody, has taken his bed. Mrs. Hall devises a plan to reunite them, sending them to investigate an escaped animal from an army hospital.

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.

Skeldale House prepares for Christmas and Jimmy's first birthday, but everyone is rocked by news that Edward's ship has been sunk. Tristan is given an important mission to source the best local pigeons for a breeding programme.