FILMS ON TV

times for a Golden Globe, winning one. So it makes sense that Elba couldn’t turn his back on the genius cop.

Reprising the titular role for a fifth series, the star will find his character caught up in a new nightmare as he is once again called to immerse himself in the depths of human depravity.

While London’s monstrous and seemingly indiscriminate killings become ever more audacious and public, Luther and new recruit DS Catherine Halliday – played by Bafta winner Wunmi Mosaku – face a tangle of leads and misdirection that seems designed

as part of their New Year resolutions. In this documentary, Dispatches investigates the rising popularity of veganism. It’s better for your health, the environment and animals but why do some activists resort to such extreme tactics to promote it? Reporter Morland Sanders meets farmers who feel increasingly worried about some vegan protests and looks into the ideology behind the diet, speciesism.

THURSDAY Back in Time for School (BBC2, 8pm)

Fifteen teenagers and three teachers embark on a time-travelling adventure through 100 years of school history. Led by presenter Sara Cox and social historian Polly Russell, the volunteers

Idris Elba as John Luther with Wunmi Mosaku, who plays new recruit DS Catherine Halliday