Nick Willard

Nick Willard was an American tourist who visited London in the 1970s. He avoided being hypnotised by the Zerons and helped the Third Doctor defeat them. (COMIC: Zeron Invasion)

Behind the scenes
Nick Willard was the first black companion, and indeed the first person of colour to fill the role, in any medium, in Doctor Who history.

Because Nick was a one-off in 1972 for the comic Zeron Invasion, Sharon Davies — later introduced in 1980's Doctor Who and the Star Beast — instead holds the title of first recurring POC companion.