Selina Cadell

After successfully rekindling their relationship, Louisa and Martin are living together again, but Louisa finds herself juggling too many responsibilities at once. As Portwenn prepares for a wedding, Bert hopes to profit from the festivities.

As Martin and James wait patiently to see Santa in his Grotto, Martin spots a medical concern that has him shut it down and send Santa packing-- until he's sure he isn't infectious. Louisa is determined not to let Martin ruin Christmas.

"Iris Carr is travelling across Europe by train when she unwittingly becomes embroiled in a sinister Balkan plot. Feeling disoriented after a fall, Iris is befriended by Miss Froy, an elderly English woman sharing her carriage. But when she wakes up from a few hours' sleep, Miss Froy has vanished without a trace. As fellow passengers claim the lady never existed, Iris faces danger and intrigue as she fights to discover the fate of Miss Froy-- and...

Morwenna's missionary parents pay her a surprise visit and are taken aback by her relationship with Al. As Louisa starts her new counseling course, Penhale investigates a break-in at the school, in which nothing was stolen.

Martin stops practicing the week before his hearing, but patients continue to solicit his advice. An American tourist asks Mrs. Tishell for help, and Penhale commissions a bust of himself.

With James teething, Martin and Louisa are desperate for more sleep. In an unusual display of mourning, Mrs. Tishell closes the pharmacy, inconveniencing everyone. Meanwhile, Al needs Bert's help to get the whisky business back on track.