The One With The Ice Warriors On The Moon.

The Seeds of Death isn't a great title for this, but was no doubt a better-sounding one before season 13's The Seeds of Doom came along and muddied the waters somewhat. Oh, and it's the last Troughton story! I think we're down to the last six now...

The first episode of The Deadly Assassin was broadcast on Saturday 30 October 1976.

At the time it was arguably the most anticipated – and subsequently the most reviled – Doctor Who story ever, at least according to the loudest voices among the nascent Doctor Who Appreciation Society in the months that followed.

It would certainly prove to be a turning point for the show. Not just because it changed forever our perception of the Time Lords, establishing the Rassilon-based mythology that would still be at the heart of the show nearly four decades later. (See Hell Bent.)

This was the serial – especially the largely Matrix-set Part Three – that pushed past the line in the sand up to which BBC Executives had always been willing to defend the show’s production team from the “slings and arrows” of outrage from self-appointed clean-up TV campaigner Mary Whitehouse.

Of course, Hinchcliffe was simply too talented an individual for the BBC to lose, so (what with him being a staff producer) he was simply “moved on” to another show, specifically the “more adult” crime drama Target—ironically initially set up by Graham Williams, who would succeed him as producer of Doctor Who. A polite way, nevertheless, of saying: thanks to Whitehouse, Philip Hinchcliffe remains the only producer of Doctor Who effectively sacked from the role.

Family means everything!

Last of The Romanovs is one of my favorite Big Finish stories starring the 1963 team, with the crew making sure it felt authentic to the tone of the earlier First Doctor stories set in the past. Said tone helps set in the dread of the incoming fate of the former Tsars, and not wanting to post spoilers but the twist on “Chimney Sweep” was a personal favorite.

The dematerialisation gun can literally erase you from time. As in, it causes you to have never existed in the first place.

On Wednesday 29 October 2008, during the interval of that evening's performance of Shakespeare's Hamlet, the production's star David Tennant accepted the "Outstanding Drama Performance" award at that year's National Television Awards for his work on Doctor Who.

After weeks of speculation, he also publicly confirmed that he would soon return to Cardiff to film a series of specials to be shown during 2009, but that when the show returned in 2010 it would be without him.

"It would be very easy to cling on to the Tardis console forever," he explained, "and I fear that if I don't take a deep breath and make the decision to move on now, then I simply never will, and you'll be wheeling me out of the Tardis in my bath chair."

Tennant, of course, would subsequently return as the 10th Doctor in 2013 (The Day of the Doctor) and as the 14th Doctor in 2023 (The Star Beast, Wild Blue Yonder, and The Giggle).

On Tuesday 27 October 1970, script editor Terrance Dicks contacted BBC screenwriter and producer Louis Marks to confirm that he and producer Barry Letts were definitely interested in his revised story idea, but that they sadly couldn’t commission anything until BBC executives had confirmed Doctor Who would continue into its ninth season.

Marks had initially proposed a story (titled The Ghost Hunters) in which guerrillas from the future travelled back to the present day in order to prevent a military dictatorship from dominating their world. Marks’ revised idea added the Doctor travelling forward into the guerrillas’ world, which particularly appealed to Dicks: "The addition of the 'going into the future' storyline gives it the added science fiction feeling that we need," he wrote.

Letts and Dicks finally received confirmation of the show’s ninth season in early 1971, meaning it wasn’t until Friday 22 January – almost a year before the serial’s broadcast – that Dicks was finally able to commission Marks to develop his storyline.

Dicks would subsequently commission the full scripts on 1 April, although special permission was by then required from the BBC Plays Department as Marks had become one of its BBC staff script editors. (Officially, script editors were not supposed to write for either their own, or other BBC shows. Don’t tell Robert Holmes.)

As Marks submitted his scripts and Dicks got to work, The Ghost Hunters would be retitled Years of Doom and later The Time Warriors. However, once Letts and Dicks decided to add a certain old enemy of the Doctor as an additional story “hook” – given the serial’s position as the opening story of the season – the title shifted briefly to Return of the Daleks and then The Day of the Daleks.

That definitive article would subsequently disappear and reappear on the official paperwork for the rest of the year: it was finally gone for good when Episode One of Day of the Daleks was broadcast on Saturday 1 January 1972.

The One With The Tiled Floor

The Eighth Doctor can withstand Technology Built to modify Biodata that contains the target's personal timeline, where their perception, history, appearance, personality and ontological nature of the individual can be changed and Time Lord's biodata themselves is connected to the Time Vortex.

The One With The Ambassadors...

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Of Death!

The One With Morbius' Brain.