This episode contains spoilers.
Ah, well. I suppose three good episodes in a row was too much to hope for.
Knock Knock is the requisite Scary Episode of this season. It starts off very scary indeed (well, bearing in mind that I used to get freaked out by the Daleks) and goes downhill quite rapidly.
So. Bill and five friends-of-friends are searching for a student house to rent and having abysmally little luck when a mysterious stranger played by David Suchet approaches them and offers to rent out his mansion for an absurdly low price – provided they don’t go into the tower.
Pro tip, student househunters: never, ever rent a room off a mysterious stranger you just met. Particularly one played by David Suchet.
Against all common sense, the gang sign the Landlord’s contract and move in. But why do the floorboards creak so in the empty corridors? What’s the noise like tiny footsteps that one of the housemates keeps hearing above his head? Why does the tree outside sway in the non-existent wind? And what about Pavel, the housemate who’s not been seen for a day?
These are profound questions, well asked. The paranoia and claustrophobia build up in the house until it’s nearly unbearable, and the differing reactions of the housemates – some passing it off as a prank, some genuinely terrified – are a nice touch. (Actually, Knock Knock has overtones of the spin-off series Class, thanks to its diverse ensemble cast, each with an actual character to play rather than what feel like inherently supporting roles.)
And then – the tension breaks as doors slam and shutters seal themselves and the walls knock, knock, knock. The housemates are trapped.
But they are, at least, trapped with the Doctor, who’s been helping to move Bill’s stuff in and has refused to leave since then. The Doctor quickly gets to the heart of the action and solves the mystery, and Everything is Made Better by Love. Overacted love.
Doctor Who has two problems with horror stories. The first is that 45 minutes is really too little time to build up enough tension to make it scary while also having a decent payoff for that tension. It is possible to strike the right balance, as Blink proved, but it’s difficult.
The second is that the writers always try and make the payoff emotionally meaningful, usually in a way that is entirely, painfully unsubtle. Again, it is possible to have an effective, meaningful payoff, but, again, it’s difficult, especially on a show still nominally aimed at twelve-year-olds.
In this case, the episode is trying to be about parenthood. Specifically, it turns out, the Landlord has been keeping his mother alive by feeding people to the alien woodlice which infest the house. Only he’s told her, for…reasons, I guess? that she’s his daughter, and that as her father he knows best.
That’s the battleground of Knock Knock: who knows best. When the Landlord’s mother discovers the truth, she also discovers that she can control the woodlice. That would be an interesting device, if it was established as a point of worldbuilding: that the lice respond specifically to motherhood, or something like that. But it isn’t. Apparently motherhood just gives her a natural authority – which she uses, effectively, to commit suicide and kill her son along the way.
Mother knows best!
And there are troubling overtones of parenthood in the relationship between Bill and the Doctor, too. Embarrassed by his presence – an embarrassment which I read as Bill fearing her new housemates might think she was sleeping with him – Bill pretends that the Doctor is her grandfather. She repeatedly tries to get him to leave the house in a way that makes it clear that she’s trying to set some boundaries:
This is the bit of my life that you’re not in.
Look at the way the episode frames Bill’s boundary-setting. We know, of course, that there’s something badly wrong with the house, and that the best chance for Bill and her friends is if the Doctor sticks around. So, not only does the Doctor refuse to leave; we as viewers are forced into recognising that he’s right not to leave, because, after all, grandfather knows best!
Except the Doctor isn’t Bill’s grandfather. And Bill is an adult woman. What this episode is doing is trampling all over her agency, undermining all the work the series has done to establish her as smart and independent and progressive. Being the Doctor’s companion, being under his protection, apparently makes it OK for him to infantilise her in a way that the narrative structure of the episode validates and supports.
This, by the way, is pretty similar to the Doctor’s relationship with Clara.
Knock Knock wants to be a moving exploration of the power of parenthood. In fact, what it is is a look at two very fucked up parenthood models. That’s the core problem of Moffat-era Doctor Who for me (note: this episode was not actually written by Stephen Moffat): it tries to make us believe in, and root for, relationships which are not just flawed but actually, dangerously rotten to the core. It doesn’t know what healthy relationships look like. That’s why its more emotion-driven plots don’t work.
Next time, zombies in space. Really?