Only two of the seven Doctor Who (1963) serials she starred in are known to have survived the BBC's wiping policy in their entirety. These are Doctor Who: The Tomb of the Cybermen: Episode 1 (1967) (all four episodes were discovered in Hong Kong in 1991) and Doctor Who: The Enemy of the World: Episode 1 (1967) (all six episodes were discovered in Nigeria in 2013).