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.

Terror of the Zygons
	1	Terror of the Zygons (Part 1)
	2	Terror of the Zygons (Part 2)
	3	Terror of the Zygons (Part 3)
	4	Terror of the Zygons (Part 4)
Planet of Evil
	5	Planet of Evil (Part 1)
	6	Planet of Evil (Part 2)
	7	Planet of Evil (Part 3)
	8	Planet of Evil (Part 4)
Pyramids of Mars
	9	Pyramids of Mars (Part 1)
	10	Pyramids of Mars (Part 2)
	11	Pyramids of Mars (Part 3)
	12	Pyramids of Mars (Part 4)
The Android Invasion
	13	The Android Invasion (Part 1)
	14	The Android Invasion (Part 2)
	15	The Android Invasion (Part 3)
	16	The Android Invasion (Part 4)
The Brain of Morbius
	17	The Brain of Morbius (Part 1)
	18	The Brain of Morbius (Part 2)
	19	The Brain of Morbius (Part 3)
	20	The Brain of Morbius (Part 4)
The Seeds of Doom
	21	The Seeds of Doom (Part 1)
	22	The Seeds of Doom (Part 2)
	23	The Seeds of Doom (Part 3)
	24	The Seeds of Doom (Part 4)
	25	The Seeds of Doom (Part 5)
	26	The Seeds of Doom (Part 6)