Season 11
It was Jon Pertwee's final season as the Doctor and included, very briefly, the first appearance of Tom Baker as the Fourth Doctor. The Time Warrior, the season opener, introduced Sarah Jane Smith, who was a frequently featured character in the Doctor Who universe decades after her departure in Season 14. The same story also, for the first time, named the Doctor's homeworld as Gallifrey. UNIT also began to be phased out of the series during this season.
Episodes
1 The Time Warrior (1) Dec 15, 1973 
2 The Time Warrior (2) Dec 22, 1973 
3 The Time Warrior (3) Dec 29, 1973 
4 The Time Warrior (4) Jan 5, 1974 
5 Invasion (1) Jan 12, 1974 
6 Invasion of the Dinosaurs (2) Jan 19, 1974 
7 Invasion of the Dinosaurs (3) Jan 26, 1974 
8 Invasion of the Dinosaurs (4) Feb 2, 1974 
9 Invasion of the Dinosaurs (5) Feb 9, 1974 
10 Invasion of the Dinosaurs (6) Feb 16, 1974 
11 Death to the Daleks (1) Feb 23, 1974 
12 Death to the Daleks (2) Mar 2, 1974 
13 Death to the Daleks (3) Mar 9, 1974 
14 Death to the Daleks (4) Mar 16, 1974 
15 The Monster of Peladon (1) Mar 23, 1974 
16 The Monster of Peladon (2) Mar 30, 1974 
17 The Monster of Peladon (3) Apr 6, 1974 
18 The Monster of Peladon (4) Apr 13, 1974 
19 The Monster of Peladon (5) Apr 20, 1974 
20 The Monster of Peladon (6) Apr 27, 1974 
21 Planet of the Spiders (1) May 4, 1974 
22 Planet of the Spiders (2) May 11, 1974 
23 Planet of the Spiders (3) May 18, 1974 
24 Planet of the Spiders (4) May 25, 1974 
25 Planet of the Spiders (5) Jun 1, 1974 
26 Planet of the Spiders (6) Jun 8, 1974