Season 26
It was the final season of the "classic" series. Unusually for a Doctor Who season, aside from some scenes in Survival, all the stories took place on Earth. Apart from Battlefield, the stories followed a loose character arc, as Ace came to terms with her past. As for the Doctor, he had become darker in personality, treating others as pawns in the battle between good and evil while dressing in dark clothes to match his personality change. This was the first and so far only season to be produced entirely out of broadcast order.
Episodes
1 Battlefield (1) Sep 6, 1989 
2 Battlefield (2) Sep 13, 1989 
3 Battlefield (3) Sep 20, 1989 
4 Battlefield (4) Sep 27, 1989 
5 Ghost Light (1) Oct 4, 1989 
6 Ghost Light (2) Oct 11, 1989 
7 Ghost Light (3) Oct 18, 1989 
8 The Curse of Fenric (1) Oct 25, 1989 
9 The Curse of Fenric (2) Nov 1, 1989 
10 The Curse of Fenric (3) Nov 8, 1989 
11 The Curse of Fenric (4) Nov 15, 1989 
12 Survival (1) Nov 22, 1989 
13 Survival (2) Nov 29, 1989 
14 Survival (3) Dec 6, 1989