Convention
From Tardis Wiki, the free Doctor Who reference
The Sixth Doctor and Peri Brown once attended a 21 years of Who convention that used the Doctor's TARDIS. The Doctor thought it was the obvious answer after the BBC were criticised for the lack of space at a previous convention at Longleat but still thought it was a bit of a cheek. (NOTVALID: Doctor Who? 90)
In 2003, as the mania for Doctor Who-related merchandise grew, Patrick Troughton was sold for eighty-eight million pounds at a convention. (NOTVALID: The Next 20 Years)
