The Faceless Ones
Doctor Who: Season 4, Episode 32
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The missing Polly appears, but she claims she doesn't know who the Doctor or Jamie are. Then, Ben disappears too. All clues point to Chameleon Tours, but nobody believes the Doctor's story.
Show: Doctor Who
Air date: April 15, 1967
Writers: Malcolm Hulke and David Ellis
Directors: Gerry Mill and AnneMarie Walsh
Episode(s) missing: 4 episodes (2, 4–6)
First broadcast: 8 April 1967
Last broadcast: 13 May 1967