Two classic Doctor Who stories thought lost forever have been found and made available to fans.
Tape canisters just like this one were located in a warehouse in Nigeria.
The yetis were controlled with spheres like this.
In The Enemy Of The World, Patrick Troughton plays both the Doctor and his lookalike enemy, Ramon Salamander.
Also, he goes for a swim.
Yesterday in London, footage from both was broadcast for the first time in 45 years.
Who fan and writer Mark Gatiss turned up to host proceedings.
Gatiss this morning.
Once again, it's the one with the yetis on the London Underground.
Frazer Hines and Deborah Watling, who played companions Jamie and Victoria in both stories turned up to celebrate the discovery.
Frazer remembered a funny story about London Transport.
Deborah was particularly emotional, since most of her era is missing.
Everybody was correctly full of praise for Patrick Troughton, the greatest of the classic Doctors.
Asked whether Doctor Who is due a return to the Underground, Gatiss let slip a teaser about the other show he works on.
Both stories are available to download right now from iTunes.
The Enemy Of The World will be available on DVD on November 25, with The Web Of Fear following in early 2014.