LOUIS THEROUX: DARK STATES, BBC2, 9pm

I THINK the horror of this series is being revealed in ascending order – in which case I utterly dread the final episode.

This week, Louis investigates human trafficking and goes to Houston, Texas, to meet prostitutes and their pimps, where “the line between choice and force isn’t always clear”, and looks at the troubling link between the sex worker and the man who guards her.

He books into a seedy motel where he has arranged a meeting with a prostitute. He asks her what her working life is like. She says she enjoys it: “I love sex. I love money. So I got the best job in the world!” But she is nonetheless a slave to her pimp – “I update him on every move I make” – and she gives him every single penny. He’s harsh, she admits, but “who wants a weak-ass dude protecting you?”

Women who try to work without pimps are known as “renegades” and often physically attacked by other prostitutes, while another woman says of her pimp: “I couldn’t wait to put that money in his hand cos I knew I was gonna be praised.”

ELECTRIC DREAMS, C4, 9pm

WE’RE half-way through this series of unsettling sci-fi stories so I think it’s now safe to say this is no replacement for Black Mirror – which I suspect Channel 4 were hoping it might be. In fact, when I watch it I just end up wanting to reach for my phone to google “when is black mirror coming back?”

So if it wasn’t for the crushingly superior Black Mirror, would we all be loving Electric Dreams? I suspect not because, being based on short stories by Philip K Dick, it would surely prompt you to pick up that damn phone again and place an online order for the book. The series, although very good, just can’t help being overshadowed by far greater things.

This week’s story stars Anna Paquin and tackles the subject of virtual reality, and what happens when it starts seeming more real than authentic reality, and the madness which occurs when the virtual world starts to invade the original one?