Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Zoe Heriot (sometimes spelled Zoe Herriot), or simply Zoe, is a fictional character played by Wendy Padbury in the long-running British science fiction television series Doctor Who. A young astrophysicist who lived on a space wheel in the 21st century, she was a companion of the Second Doctor and a regular in the programme from 1968 to 1969. Zoe first appears in the serial The Wheel in Space, where she is the librarian on board Space Station W3, also known as the Wheel. When the Cybermen attack, she aids the Doctor and Jamie in defeating them before stowing away aboard the TARDIS. In David Whitaker''s script for The Wheel in Space, Zoe''s last name is spelled "Heriot", but the double-"r" misspelling is also seen in reference works. Zoe''s age is not given in the series, but according to initial publicity she was fifteen when she joined the TARDIS crew.