Police had to be called to Wookey Hole on Friday night as the village saw the return of a Timelord after 32 years.
This year's Doctor Who Christmas special, the first part of which was broadcast on Christmas Day and with the conclusion showing tomorrow, features scenes shot in Wookey Hole Caves.
Doctor Who filmed at Wookey Hole Caves once before for the 1975 Tom Baker episode Revenge of the Cybermen. Also, two years ago, scenes for the episode The Lazarus Experiment were filmed in Wells Cathedral.
Police had to be called to deal with a number of fans attempting to get inside information on the cult show.
Fans of the show, also known as Whovians, track the location shoots stake out familiar spots in Cardiff and Swansea, where co-stars Catherine Tate and Bernard Cribbins have been seen filming.
But one fan spotted the BBC's unmarked vans at Wookey Hole Caves, extras wearing monk-like robes and a secretive David Tennant, who spent most of his time in his trailer before heading off to film in the Witch's Parlour.
Wookey Hole Caves were also used for the filming of the second Harry Potter movie, as part of the eponymous Chamber of Secrets and for scenes of the 1980s television series Robin of Sherwood.
The Doctor Who special showing this year, entitled The End of Time, is the final story for David Tennant's Doctor, and by the end he will regenerate into the new Doctor, played by Matt Smith.
Wookey Hole Caves could be seen as part of the home planet of the Ood, one of the most popular monsters introduced in the new series, or for the fabled planet of Gallifrey, where the leader of the Timelords is played by Timothy Dalton, last seen in Wells as scheming supermarket boss Simon Skinner in Hot Fuzz.
The final part of The End of Time can be seen tomorrow, at 6.40pm on BBC1.