An eccentric incarnation, the Fourth Doctor is a whimsical and sometimes brooding individual whose enormous personal warmth is at times tempered by his capacity for righteous anger. He has been characterised as a clownish adventurer, eager to dish out jokes and jelly babies whenever he deems fit. He's a bit out there at times. His companions include Sarah Jane Smith, robot dog K9, Harry, Leela, Romana, Adric, Nyssa, and Tegan. Like incarnations before him, he travels in the TARDIS.