Martin finally admits his decision to resign was a mistake, and sets out to be reinstated as Portwenn's much-needed GP, resolving not to allow his blood phobia to interfere. But will the powers that be see fit to take him back?
Morwenna is back as receptionist and the Ellinghams have a new dog. Martin attends Stewart's survival course, but not as a participant like Al and Penhale.
Martin rubs up against the new herbalist and Penhale, Louisa, and James are all interested in Janice's new pedicure fish. Ruth is back from Mexico with more than maracas.
To say Louisa Ellingham is stunned to find her estranged father in her kitchen making a cup of tea is an understatement. The child counselor hasn't seen Dad in years, and given his dodgy past she's worried about his return to Portwenn.
Doc Martin's relationship with Louisa has had its ups and downs over the years, and the married couple are tested as never before when his ex Sophie Trent makes a move.
The news of Martin's Imperial College job offer is flying through the village, but the Ellinghams are yet to make a decision - meanwhile, Caitlin blames Bert for the pub flood.
The village is throwing the Ellinghams a farewell party. Ruth is helping Sally deal with the news, but it seems that Martin and Louisa aren't going to make it to the party.
Portwenn is full of festive cheer - until Doc Martin cancels the Santa, prompting his portrayer to show "Doc the Grinch" the magic of Christmas, with unintended consequences.