Will Brooks’ 50 Year Diary - watching Doctor Who one episode a day from the very start... 

Day 141: The Tenth Planet, Episode Four

Dear diary,

Of all the Doctor Who episodes missing from the BBC's archive, The Tenth Planet Episode Four probably has the most mythical status. It's the one in which William Hartnell changes into Patrick Troughton, of course, but it's also one of those odd ones where we can't very easily trace when the tape went missing. There's no definitive record of its destruction, just the fact that it stopped being around after a certain point.

As I've said, I've never watched The Tenth Planet, so I've never known how justified the status of this episode was. It has to be said that - regeneration aside - there's not a lot in here to make it really stand out from any other episode of the programme around this time. It's quite good, don't get me wrong, but there's nothing all that amazing about it until the final few minutes.

I've always been aware of the resolution to the story - that Mondas ultimately absorbs too much of Earth's power and blows itself up. That's really not the important thing about the story, though. This is often talked about as the very first 'Base Under Siege' tale (something that will be cropping up a lot more in the next four months of this blog!), and that really is the best way to describe it. The appearance of Mondas in the skies, the absorption of power, the Cybermen landing globally, all of that takes second place to the crew of the Snowcap base, and watching them fight off wave after wave of attackers.

It's nice that the Z-Bomb which has been so important since around Episode Two is used as a vital part of keeping our Mondasian friends at bay in this final episode, and I'm sure that the sight of a Cyberman creasing up in pain as he enters the radiation room would have been fantastic. The tele snaps unfortunately miss the shot of his demise (though we do get a great close up of the creature's face), but everything around it looks great.

I really have been won over to the design of the Cybermen throughout this tale, and the shots of them that we do have hear continue to make them look fantastic. There's the one moment when a Cyberman on the radio from Geneva seems to be singing all his lines, but I think I can just about overlook that. Finally, I understand why everyone is always so full of praise for them! On the one had, I'm now quite sorry that they only appear in this one story, but on the other, it gives them a certain charm. They're what William Hartnell's Cybermen looked like.

Now obviously, the thing that gets the most attention in this episode is always going to be the transformation between the First and Second Doctors. I've seen the actual change hundreds of times over the years, but this is the first time that I've ever watched the events leading up to it. The whole thing is played as being very sinister - the Doctor's cryptic mumbling is especially unnerving. 'It's all over,' he slurs, 'that's what you said. But it isn't. It's far from being all over!'. It really is an odd sequence, and no attempt is made to have this as a comforting change over between the two actors. The entire thing is played as a new kind of threat, and worthy of a cliffhanger because it's scary, not simply because it's what we'd now call a 'regeneration'.

I'm really pleased that the change is filtered in right from the start of this story, with the Doctor commenting early on that his body seems to be wearing a bit thin. It makes it all the more rewarding when you know what's coming, and saves it from just being something bolted on to the end of the story. I'll be offering up more general thoughts about William Hartnell's tenure in my 'overview' post (which you should find just above this one in the Doctor Who Online news feed), but I'll say here that I genuinely am sorry to see him go.

7/10