Zoe Heriot
Zoe first appears in the serial The Wheel in Space,[3] where she is the librarian[4] 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.[5] In David Whitaker's script for The Wheel in Space, Zoe's last name is spelled "Heriot",[6] 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.[7] She holds a degree in pure mathematics[4] and is a genius, with intelligence scores comparable to the Doctor's....read more