10 Darkest Doctor Who Moments

While the Daleks started NuWho as the more menacing monsters, the Cybermen have stomped back strongly with some terrifying turns in Series 10 and Series 12.

Notwithstanding the gruesome scene where we see people being upgraded in a whirl of saws and scissors, John Lumic's Cyberman design was too robotic – you sometimes forgot that these machines were once living, breathing people. Then again, perhaps that was the point – to make scenes like this one all the more affecting.

After the Doctor and Mrs Moore successfully navigate their way through the cooling tunnels underneath the Cyber-conversion factory, Moore takes out a Cyberman with an electromagnetic bomb. The Doctor begins examining it by removing the front plate to reveal its inner workings, but in doing so, he realises that its emotional inhibitor is broken.

The Cyberman reacts by saying "Why am I cold?", and goes on to explain that her name is Sally Phelan, and that she was going to get married to Gareth the following day. Even with a Cyber-voice, you can hear the anguish, the pain.

It's one of those rare moments that brings humanity to the Cybermen, and truly makes you realise how horrifying it is that there's a lost, terrified soul somewhere inside that cold metal shell.