In this bonus episode David provides a map to the many missing episodes we hit at this part of our ramble.

The story lines aren't even the most dramatic part of this tale - the behind-the-scenes tension and personnel changes are remarkable.

So if you've not heard it before, get ready for David to spill the tea. And if you know how it goes, enjoy the retelling and let us know if you have any further scandalous detail!

The crew arrive on an arid planet where they meet the beautiful Drahvins and the hideous Rills and we try to get animated for yet another dead planet.

David is confused by the title and learning to accept it’s ok to enjoy the colourised animations. He also delivers some Radio 4-worthy political satire.

Sarah is annoyed by the silly roombas but loves the Stepford soldiers and admits to mainly watching for the novelty of colour - ooh the opening credits have been Tangoed!

Make America Great Again versus The Good Life? Don’t be so silly Jerry. Anyway, we’re off to Stockport for a curry. Byeeee!

Firsts: majority animated story, first time iPayer is actively trying to confuse us

The gang arrive in Saxon Northumbria in 1066 on the eve of the Viking and Norman invasions. A mysterious monk is at work in the nearby monastery, intending that history takes a different course.

Monk’s just want to have fun! Sarah is a bit confused as this baddie in a hoodie seems to be altruistic, wanting to make life easier for Europeans in the measly middle ages. The Doctor doesn’t want this - does that make him pro Brexit??

This funny monk makes a lovely breakfast for his prisoner, enjoys a good Gregorian chant and Sarah tries to ship him and the Doctor. Why can’t we be friends? And stowaway Steven gets an upgrade to companion, despite not believing a word the Doctor says.

We talk about how the Doctor has infinite capacity for empathy when talking about whole races of people, but individuals seem to basically annoy him. And then we laugh about beating off the vikings and their very big helmets. It’s a show of two halves!

Firsts: we see that history is changeable despite what the Doctor told Barbara, Steven Taylor is an official companion, we see another TARDIS, first appearance of the Meddling Monk, first visit to historic Britain

The Daleks are equipped with their own time machine, are on the trail of the Doctor with orders to exterminate him and the crew. They go planet-hopping in the TARDIS to escape them.

It’s the Wacky Races in space!

Sarah was so excited for a Dalek story and is very disappointed. Ian and Barbara assume the role of parents again as the Doctor and Vicki run riot through a dead planet (classic), a jungle planet (another classic), 1960s New York, a terrifying ship, and a ridiculous Hammer Horror haunted house.

David tried to convince Sarah this grab bag of assorted nonsense is joyful and (sometimes) intentionally funny, but his even his boundless goodwill is stretched by the appearance of the mecho-Doctor.

We’re sorry to see Barbara and Ian go, but let’s slide down this massive building and get the heck out of here!

Firsts: all the original line-up have changed, first on screen moment for new companion Steven Taylor, first non-TARDIS time machine, and the first confirmation that the TARDIS is blue!

The TARDIS jumps a time track and the crew arrive on the planet Xeros. There they discover their own future selves displayed as exhibits in a museum and go up against the warlike Morok invaders to save themselves and the native Xerons.

We’ve jumped a time track and we’re locked in The Space Museum by mistake!

Join us in our very own lost episode as we gaze at the strange exhibits and learn absolutely nothing. In fact, this museum may actually make you stupider. And your knitwear will be trashed!

Sarah appraises the TARDIS furniture, gets excited about a Dalek cameo, and grumbles about the passive nature of the complicated timey-wimey plot. David gets spooked by the sinister doppelgangers and funny eyebrows. We both cheer on Vicki and her rebellion. Boys will literally overthrow an evil empire just to impress a girl.

Don’t look at the Trip Advisor reviews!

Firsts: (weirdly) time travel as a plot line, first screen appearance of Jemery Bulloch who goes on to play a pivotal role in Star Wars.

The Doctor and his companions ally themselves with the Menoptra, the former inhabitants of Vortis, as they struggle to win back the planet from the Animus and her Zarbi ant slaves.

We try and make some sense of a very WTF episode where we think an ambitious production bit off more than they could chew.

On a very alien plant the Doctor loses the TARDIS and Ian loses his pen and his tie. Sarah loses her mind over the annoying noises, irritating voices, strange dancing and so many other things, and is delighted when the Animus pipe turns up to translate.

We love Vicki’s sass and how brave she and the Doctor are in the face of many irritating giant insects. And General Barbara plans for war, again.

Oh bee-have!

Firsts: Tardis grabbed by an external force, entirely non-humanoid supporting cast, giant creepy-crawlies

Landing in Rome, A.D. 64, the travellers take a rare holiday. While Ian and Barbara are happy to relax, the Doctor and Vicki set off to pursue adventure.

Carry On with us into Ancient Rome on our little holiday as we dance around with groovy lyres and sneaky liars.

The gang bond over their all-inclusive hotel (aka decadent squatting) but get into trouble in the marketplace and find themselves auditioning for Banged Up Abroad.

Derek Francis brings us the queeniest most threatening emperor you’ve ever seen but the Doctor turns his charm and campery up well past 11 and outwits him at every turn. And the gang get a package tour of all the bad things that might doom an average Roman citizen, including being the object of Nero’s affections. Turns out Nero plays Yakety Sax while Rome burns.

Firsts: all-out full-on comedy, first ocean-going ship

The Doctor, Ian and Barbara arrive on the planet Dido. They find a crashed spaceship, the only two survivors of which are terrorised by the monster Koquillion.

It's Vicki versus the man with the bejeweled spanner in a story that shares a bit of DNA with Con Air. The Doctor, in a twinkly mood, despite missing Susan, is looking to adopt an orphan in desperate need. The planet Dido can provide. But there's only space on the TARDIS for one more. No creatures with mandibles need apply.

We’re impressed by Barbara’s continuing ability to do everything and how much story you can cram into two episodes.

Content warning: Sarah does sing in this episode. But give her a break; she’s very emotional about Sandy’s untimely end. RIP.

Firsts: new companion, reference to the Doctor’s qualifications, first time in the top 10 most-watched shows of the week