Doctor Who
Doctor Who began in 1963 as an educational children's programme intended to teach history and science, and survived for six decades by inventing a solution to its own casting problem: when its lead actor became too ill to continue in 1966, the production explained the recasting in-story as the character physically regenerating. That single improvisation turned a fixed-term series into an indefinitely renewable one, and it remains the most consequential piece of practical problem-solving in television history.
About Doctor Who
Doctor Who began in 1963 as an educational children's programme intended to teach history and science, and survived for six decades by inventing a solution to its own casting problem: when its lead actor became too ill to continue in 1966, the production explained the recasting in-story as the character physically regenerating. That single improvisation turned a fixed-term series into an indefinitely renewable one, and it remains the most consequential piece of practical problem-solving in television history. The programme is by some distance the longest-running science-fiction series ever made.
Regeneration was invented in 1966 purely to replace an ailing lead actor, and became the device that has kept the series running ever since.
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Key eras
| Era | Years | What happened |
|---|---|---|
| Classic era | 1963–1989 | Twenty-six seasons and seven lead actors. |
| Hiatus | 1989–2005 | Off air apart from a 1996 television film. |
| Revival | 2005– | Relaunched by Russell T Davies and returned to mainstream prominence. |