Planet of Giants is the first serial of the second season in the British science fiction television series Doctor Who. Written by Louis Marks and directed by Mervyn Pinfield and Douglas Camfield, the serial was first broadcast on BBC1 in three weekly parts from 31 October to 14 November 1964. In the serial, the First Doctor (William Hartnell), his granddaughter Susan Foreman (Carole Ann Ford), and her teachers Ian Chesterton (William Russell) and Barbara Wright (Jacqueline Hill) are shrunk to the size of an inch after the Doctor's time machine the TARDIS arrives in contemporary England.