Overall we are left wondering if there were even more than two to begin with, gathering from what we know. The Doctor and Clara arrive at a North Pole base where four of the crew in the infirmary are being devoured by Dream Crabs blind aliens which induce. If there are more dream crabs on Earth we can be sure that they might make a reappearance further down the line or just completely forgotten. Dream Crabs - Last Christmas Doctor Who Tv, Last Christmas, Dr Who, Tardis. Since Moffat symbolized the tangerine in the last scene as Santa getting Clara and the Doctor back together, we might also assume that perhaps there were only two dream crabs on Earth and it was used on only them in an effort to bring them back together. This being said it could mean the Professor Albert might have not actually been real to begin with and just part of the dreams within dreams.
The Doctor Who special featured the jolly old elf Santa Claus, but he was somewhat upstaged by. I quite enjoyed 'Last Christmas' from the perspective of a standard episode that could have been part of Series 8's recent run (where it not for the aforementioned use of Father Christmas), although I'm tired of Who's abundance of plots involving isolated bases under siege from extra-terrestrials, where an out of their depth human crew are forced to accept the fortuitous help of The Doctor. Say, who are those folks lying there in that bed With those facehugging Dream Crabs clamped around. Last Christmas, creatures were stirring at the North Pole. Now the part about the other dream crabs besides them is debatable since Moffat stated everything until the very last part is a dream, we can probably assume that the other people who were "saved" might not even have been saved. You see, the Doctor and Clara just burst through the door.
Now the only thing we know for a FACT is that there were at least two dream crabs, the one that had The Doctor and the one that had Clara. It’s easy to lose count of how many times characters wake up from dreams brought on by the alien Dream Crabs. Since we know for a fact that everything until the very last scene was a dream we can sort of figure this out, by my answer in Did any of them wake up in the first place, we can sort of figure this out. Last Christmas is the tenth Doctor Who Christmas special in as many.