Production
| Episode | Broadcast date | Run time | Viewership |
Archive |
|---|---|---|---|---|
| "Episode One" | 30 December 1972 (1972-12-30) | 24:39 | 9.6 | PAL 2" colour videotape |
| "Episode Two" | 6 January 1973 (1973-01-06) | 24:18 | 10.8 | PAL 2" colour videotape |
| "Episode Three" | 13 January 1973 (1973-01-13) | 24:22 | 8.8 | PAL 2" colour videotape |
| "Episode Four" | 20 January 1973 (1973-01-20) | 25:07 | 11.9 | PAL 2" colour videotape |
Working titles for this story included The Black Hole. The script was originally supposed to feature all three Doctors equally, but William Hartnell was too ill to be able to play the full role as envisioned. He was, therefore, reduced to a pre-recorded cameo role, appearing only on the TARDIS's scanner and the space-time viewer of the Time Lords. It would be the last time he played the Doctor and his last acting role before his death in 1975. Hartnell's scenes were filmed at BBC's Ealing Studios and not in a garage or a garden shed as fan myth would have it. The serial's promotional photo shoot was the only time the three actors were shown together.
The production team also planned for Frazer Hines to reprise his role of Jamie McCrimmon alongside the Second Doctor; however, Hines was not available, due to his work on the soap opera Emmerdale Farm. Much of the role originally intended for Jamie was reassigned to Sergeant Benton.
Read more about this topic: The Three Doctors (Doctor Who)
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