DOCUMENTARY

DISCOVERY Olivia Colman. Picture: BBC/ Wall to Wall/ Stephen Perry

Channel 4, 10pm THIS final episode is called “Guns, diplomacy and chlorinated chicken”, which gives you some idea of the various issues up for debate.

Cameras have gone behind the doors of the American embassy in London, revealing more about diplomacy in the age of Trump. At times, it feels more like a satire.

Tonight, ambassador Woody Johnson challenges his staff on how PICTURE THIS Life in the embassy WHO DO YOU THINK YOU ARE? BBC1, 9pm ACTRESS Olivia Colman is completely convinced that her family are “fairly boring”, while she claims to be the “least adventurous” person she knows.

So it’s brilliant TV to watch her journey through her family tree. She discovers that while it remains true that she prefers to be at home in her pyjamas, when it comes to her ancestors, she’s completely wrong.

“I feel like I know more about the Colmans, who are from Norfolk, but my mum’s family, I wouldn’t really know where they came from,” she says, remembering a rumour about a Frenchwoman.

The actress, 44, star of Broadchurch, The Night Manager and soon The Crown, adds: “I don’t know who’s been forgotten in my family and it would be nice to remember them.”

It soon becomes clear that Olivia will need to travel to India, where she finds out more about her great-great-great granny Harriot.

Records show that Harriot was an orphan, aged only three or four when she was sent from what was then Calcutta on a ship bound for England in 1811.

Stunned by the news, it’s not long before emotions get the better of mum-of-three Olivia.

“No mummy, no daddy, on a ship for six months. Oh, it’s really sad isn’t it,” she says, weeping.

But this is only the beginning of a fascinating story about the life of little Harriot that sounds like something straight out of a Jane Austen novel.

Olivia becomes completely invested in the tale, and by the end of it, you will be too. they are tackling Brexit and questions whether the multi-billion pound deal to sell US fighter planes for Britain’s new aircraft carrier, the Queen Elizabeth, is a great deal for America.

The new Trump-appointed under-secretary of agriculture, Ted McKinney, pushes for Britain to open its doors to US chlorinated chicken.

And there’s a unique look at the “special relationship” through the eyes of the embassy’s top general, as Britain and America prepare for joint air strikes in Syria.