Amongst others, Eddon has doubled C-3PO (and Princess Leia) in Return of the Jedi, Helen Slater in Supergirl, Helena Bonham Carter in Kenneth Branagh's Frankenstein, and Ace in 1980s episodes of Doctor Who. Her other film credits include Superman and Superman II, An American Werewolf in London, Batman, several James Bond movies, Mission: Impossible, and Young Sherlock Holmes.