| Doctor Who | |
|---|---|
| Season 12 | |
 Cover art of the Blu-ray release for the complete season | |
| Starring | |
| No. of stories | 5 |
| No. of episodes | 20 |
| Release | |
| Original network | BBC1 |
| Original release | 28 December 1974 – 10 May 1975 |
| Season chronology | |
The twelfth season of British science fiction television series Doctor Who began on 28 December 1974 with Tom Baker's first serial Robot, and ended with Revenge of the Cybermen on 10 May 1975.
This is the first season to feature Tom Baker as the fourth incarnation of the Doctor, an alien Time Lord who travels through time and space in his TARDIS, which appears to be a British police box on the outside. He is accompanied by companions Sarah Jane Smith (Elisabeth Sladen), continuing from season eleven, and Harry Sullivan (Ian Marter), who joins in this season. With Barry Letts and Terrance Dicks having both departed along with Jon Pertwee, new producer Philip Hinchcliffe and new script editor Robert Holmes worked on this series. Letts's last story as producer was Robot, with Hinchcliffe producing the rest of the season. Holmes had previously written for the programme.