LINE OF DUTY, BBC1, 9pm

YOU’LL find out tonight if Arnott has survived, but you won’t find out why Balaclava Man takes his padded jacket, balaclava and baseball bat to work with him just so he’s ready to pounce on any unsuspecting detectives.

But maybe Balaclava Man isn’t Nick Huntley? Maybe it’s Roz Huntley? Maybe it’s Tim Ifield, back from the dead? Maybe it’s the munchkins from The Wizard of Oz. Things are getting so silly now it could be any of those candidates.

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Nick is brought to the station for an interview, and this prompts him to question Roz about her whereabouts on the night Tim died.

We see Roz doesn’t welcome being questioned, and even shows – gasp! – a flicker of emotion when a boozy Nick starts needling her.

And that wound on her arm gets even more horrid and sends her into a fever.

We finish with one of the prolonged interview scenes that are normally a strength of the show, but this one falls absolutely flat.

COLOMBIA WITH SIMON REEVE, BBC2, 9pm

WE all have images of Colombia in our minds that are probably concerned with drugs and violence.

In this new series, Simon Reeve doesn’t offer a sunny view of the country – he is honest and fair, and shows us why it was once at risk of becoming a failed state.

However, there is reason to be hopeful. The conflict between the government and the FARC group, which almost became a civil war and has killed 200,000 people, shows signs of resolution.

There is astonishing beauty about this country, and Colombia could make billions from tourism.

But while the rest of the world is still afraid to visit, Reeve isn’t.

He shows us the beautiful Caribbean coastline then visits the coastal city of Cartagena.

It has the gorgeous white beaches we associate with Brazil, but without the tourist hordes.

“The world thinks Colombia is all about war!” the locals say.

But some parts still are: Reeve visits Buenaventura, where gangs funded by the drugs trade live, and he needs an armed escort.