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.

Thursday 5 January 1984. Warriors of the Deep. This week, the Earth’s original inhabitants wake up from hibernation after about a decade, put on their best fibreglass vests and samurai outfits, and invade an undersea base at 0.5× speed. The Silurians and Sea Devils are back — but why?

Monday 17 January 1983. Snakedance. This week, the people of the planet Manussa are about to discover that all their ancient myths are true, and that their own thirst and dissatisfaction are rearing up to strike them in rubbery serpentine form. Kate Orman joins us to discuss the second coming of the Mara.

Saturday 22 February 1975. The Sontaran Experiment. It’s cold and rainy this weekend, and so we’ve decided to catch up with Mark McManus and spend the day larking around Devonshire, falling down holes, and generally hiding from Kevin Lindsay while he brings the Sontarans to the screen for the second time.

Saturday 25 January 1969. The Seeds of Death. It’s Invaders from Mars this week, as the terrifying monsters we thawed out in 5000 AD last year make an early appearance on the Moon just sixteen years after the visit of the Cybermen. Their goal: to cement their position somewhere on the top ten list of recurring Doctor Who monsters. Jeremy Radick joins us as we try to work out exactly where.

Saturday 11 February 1967. The Moonbase. We’re walking on eggshells this week as we await the arrival of an army of marching Cybermen, approaching the Moonbase with a dastardly plan to change Doctor Who for ever. For the better, on the whole.

Saturday 21 November 1964. The Dalek Invasion of Earth. This week, we launch the second season of 500 Year Diary with the first of our Second Comings — Doctor Who’s second ever Dalek story, The Dalek Invasion of Earth. How will the Daleks survive leaving their city on Skaro and subjecting themselves to the public gaze just before Christmas?

Monday 1 January 2007. The Sarah Jane Adventures: Invasion of the Bane. We bring our first season to a close with the new beginning of Doctor Who’s most successful spinoff, in which a beloved TV heroine from our childhood was given one last chance (or twenty-seven last chances) to save the world.

Sunday 22 October 2006. Torchwood: Everything Changes. It’s 2006, which is just the time to launch a gritty and adult Doctor Who spinoff — Torchwood, a show with an immortal lead character which is basically about the finality of death. But has Torchwood learned anything from its parent show’s many, many launches and re-launches?