James 'Jamie' Robert McCrimmon played by Frazer Hines
Also played by Hamish Wilson (The Mind Robber)
Jamie joined the TARDIS shortly after he led the Doctor, Ben and Polly back to the TARDIS on Culloden Moor. Jamie was one of the few companions to meet the Time Lords. He left when the Time Lords erased all memories of his travel with the Doctor except for the first after the Doctor's trial in The War Games.