A challenge to racism and hatred in the US – and to Donald Trump himself – has come from an unlikely source: a timelord. In the third episode of the latest series of Doctor Who, the timelord travels back in time to ensure Rosa Parks’ famous bus protest takes place, tackling the issue of racism head on and lauding those who challenge it. Meanwhile, the fourth episode, Arachnids in the UK, features a Trump-like character – a self-obsessed and ruthless tycoon with presidential aspirations.