Doctor Who doesn't get more classic than this 1968 episode, missing for 45 years. When it was remastered and released in 2014, it broke all DVD sales records in the UK. Patrick Troughton is the Doctor in a story of terror in the London Underground, where a web fungus threatens the TARDIS and the Great Intelligence's robot Yeti are trying to drain the Doctor's mind. Will London be completely wiped out? 2 ½ hrs, 1 DVD, SDH.