Watching Walking Through Time (Sat, Ch 4) I couldn’t help recall the skit in Stewart Lee’s Comedy Vehicle ( Netflix ) about Ukip’s Paul Nuttall. Lee put Nuttall’s little Englander isolationism into the context of long history to expose its essential silliness.

“My name is Paul Nuttall and I say we need to ensure the brightest and best Anglo Saxons stay in fifth century northern continental Europe instead of coming over here to the UK and laying down the entire future basis of our language and culture.”

Charming natural historian Dr Tori Herridge did much the same thing (without the ire) by re-visiting, via fossils and geology, the land bridge that made Britain part of continental Europe until a catastrophic flood 450,000 years ago turned us into an island.

Until then this green and pleasant land was open to all-comers, from mammoths to homo heidelbergensis and other early human species fresh from Africa. Coming over here, stealing our fruits and berries...

Dr Tori Herridge in Walking Through Time

Other unwelcome visitors arrived in The X-Files (Mon Ch5), rebooted after years in the wilderness where unkempt Fox Mulder (David Duchovny) appears to have been spending his time.

The sci-fi pop culture classic never survived much beyond the millennium, which presented a neat psychological focal point, and certainly never recovered from 9/11 when conspiracy theories became sick rather than fun.

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Now Mulder and Scully (Gillian Anderson) are back and this time it’s the “conspiracy of men” – not aliens – that troubles Mulder.

He’s still fired up, she’s still sceptical and luckily their sultry chemistry has survived.

The first episode had too much to say, as if writer Chris Carter was re-running 14 years of late-night pub rants but, if there has to be an entirely pointless revival of an old favourite, then this entirely pointless revival of an old favourite is the one to watch.