Doctor Who (Original Series) Fourth Doctor 7 Series 42 Serials 178 Episodes Rated: PG
The Fourth Doctor was portrayed by Tom Baker. He is, to date, the actor who has played the Doctor on television for the longest period of time, having held the role for seven seasons.

The Leisure Hive
	1	The Leisure Hive (Part 1)
	2	The Leisure Hive (Part 2)
	3	The Leisure Hive (Part 3)
	4	The Leisure Hive (Part 4)
Meglos
	5	Meglos (Part 1)
	6	Meglos (Part 2)
	7	Meglos (Part 3)
	8	Meglos (Part 4)
Full Circle
	9	Full Circle (Part 1)
	10	Full Circle (Part 2)
	11	Full Circle (Part 3)
	12	Full Circle (Part 4)
State of Decay
	13	State of Decay (Part 1)
	14	State of Decay (Part 2)
	15	State of Decay (Part 3)
	16	State of Decay (Part 4)
Warrior's Gate
	17	Warrior's Gate (Part 1)
	18	Warrior's Gate (Part 2)
	19	Warrior's Gate (Part 3)
	20	Warrior's Gate (Part 4)
The Keeper of the Traken
	21	The Keeper of the Traken (Part 1)
	22	The Keeper of the Traken (Part 2)
	23	The Keeper of the Traken (Part 3)
	24	The Keeper of the Traken (Part 4)
Longopolis
	25	Longopolis (Part 1)
	26	Longopolis (Part 2)
	27	Longopolis (Part 3)
	28	Longopolis (Part 4)