Portwenn’s grumpy GP seems determined to cast himself as the Grinch, his first move here being to disappoint the kids by snatching Santa from his grotto because he suspects him of having a contagious skin condition. And don’t get the Doc started on the dangers of displaying trees indoors. They’re a fire hazard, apparently. With all this in mind, you’d think he’d be immune to the magic of Christmas, but this series finale tries to get Martin to see the error of his ways. Rather touchingly, it must be said. And, what’s more, there’s not a National Elf Service joke in sight.