The East Wing of the Hydrax (State of Decay)

Wednesday 23 November 1983. The Five Doctors. Well, our ridiculous show has just turned twenty, and so it’s time for everyone both alive and available to celebrate the occasion by reporting first to North Wales and then to the BBC Television Centre. But only one man can give them all exactly the right things to say and do — and that’s the man who knows what colour monsters are.

Saturday 22 November 1980. State of Decay. This week, on a planet where evil carnivorous overlords oppress and prey on a helpless populace, we decide to watch and discuss State of Decay.

Saturday 3 September 1977. Horror of Fang Rock. Terrance’s planned vampire story has been unexpectedly cancelled, and he has only a few weeks to come up with a replacement. Fortunately, he’s brilliant. Melvin Peña joins us to discuss Horror of Fang Rock.

Saturday 28 December 1974. Robot. This week, Terrance gives up the script editor’s seat to Bob Holmes — but not before adding a final flourish to his era (and scoring one more paycheque) as the writer of Tom Baker’s first story, Robot.

Saturday 19 April 1969. The War Games. This week, 500 Year Diary begins its six-week hagiography of Doctor Who writer, script editor and raconteur Terrance Dicks, with a discussion of his first on-screen script credit The War Games. Ten monster-free episodes culminating in a series-ruining revelation about the Doctor’s backstory — can Terrance make it work?

Saturday 26 April 2025. The Well. The surprising return of a decades-old monster leads not only to the urgent revision of a long-dormant TARDIS Wikia page, but also to an unexpected addition to the current season of 500 Year Diary. So join us, as we join Steven B for one more visit to a diamond planet called Midnight — it’s The Well.

Monday 1 December 2008. Enemy of the Bane. We return to Bannerman Road this week for the second coming of Samantha Bond as Mrs Wormwood, and she’s just as wonderful as you would expect. We also get the second coming of Kaagh the Slayer as well, at no extra charge.

Saturday 4 June 2005. Boom Town. This week, a New Series villain returns for the first time just six weeks after her first appearance — it’s Blon Fel-Fotch Passameer-Day Slitheen, wonderfully played by Annette Badland. Hannah Cooper and Pete Lambert join us.

Monday 7 September 1987. Time and the Rani. Another classic 80s villain makes her first reappearance on Doctor Who this week. But what will four serious teenage fanboys make of the fact that she has decided to dress up as Bonnie Langford?

Saturday 4 October 1986. Mindwarp. This week, the 1980s brings back its most iconic original villain (possibly) to face off against the Sixth Doctor for the second time. But is the reunion a success? Kate Orman joins us again, to discuss Mindwarp.