Life is full of aphorisms ascribing properties to particular colours. The scarlet woman. Red light spells danger. Yet, according to the first in the new series of Horizon, colour is “one of nature’s great illusions”. Even so, wearing red reduces stress and increases confidence. This examination of how colour is seen and interpreted, and how it affects us, revealed that an awful lot of science bods are bothered about how and why we see what we see.

This wasn't only the series finale, but the last ever episode of Camelot, since the American Starz network has decided to scrap plans for further seasons. It's not hard to see why. After a fairly promising start, Camelot spent several instalments staggering around aimlessly, as if writers and directors had been beheaded by King Arthur's Excalibur. Annoyingly, this tenth and final episode offered belated flashes of what the show might have been.

I Resign. It’s not a phrase you hear that often these days. Unlike, obviously, You’re Fired. There was a time, largely synonymous with the era when Tory toffs and grandees had sufficient private income to walk away from employment, that a chap could afford to resign, as the phrase has it, with honour.

Is there a place for the travelling fun fair any more? Static attractions like Alton Towers and Thorpe Park have rides that are bigger, grander, more varied and scarier than anything a traditional, transient fair could ever transport. All the Fun of the Fair’s answer was that the fair has survived by winding the clock back, rekindling the past with original Victorian and Edwardian rides. There’s still room for something less bombastic.

If you're reading this review, you'll probably be expecting a sarky analysis. It invites that - wow, posh girls with unpronounceable names have to work in a Newcastle chippy! - but the programme, which sent four Home Counties fillies up North to compare lives with four Newcastle lasses, hit on something so important that we should force MPs to watch it.

The only voice recording Sigmund Freud ever made was for the BBC. It was made in December 1938, at Freud’s West Hampstead home just a few months before the father of psychoanalysis succumbed to throat cancer. He was 82 and wouldn’t see out another year, yet here he was on fighting form: “People did not believe in my facts and thought my theories unsavoury,” he declaims, his voice clipped, precise and resoundingly emphatic. “Resistance was strong and unrelenting. The struggle is not yet over."

Meet the new Dragon, slightly different from the old Dragons. Or is she? For series nine, the squad of rich, grumpy bastards is joined by “formidable businesswoman and self-made multimillionaire Hilary Devey”, as presenter Evan Davis introduced her.

In a recent article, David Hare complained about “a national festival of reaction” in the arts, exemplified by such supposedly Establishment-leaning works as The King’s Speech and Downton Abbey. His real target was Terence Rattigan, currently being hailed in many quarters as a national theatrical treasure enjoying a renaissance in this centenary year of his birth.

Can Marcus du Sautoy do for maths what Brian Cox did for physics? Can he convince us of the beauty of numbers and help us fall in love with pi? It’s a tall order, but not only does Professor du Sautoy have an unstoppable passion for ratios, he’s also a natural communicator, which clearly helps if you’re the Simonyi Professor for the Public Understanding for Science, which he is. And so du Sautoy guided us through some basic mathematical principles which underpin the workings of the universe. He introduced us to The Code.

For 35 years, contemporary art in Iraq was a no-no unless it was grimly, dully figurative or a gaudy mural glorifying Saddam Hussein. But this year, six Iraqi artists were invited to the most prestigious annual contemporary art event in the world; the Venice Biennale. It may be of little significance that Alan Yentob’s parents came from Iraq, but last night’s Imagine was probably the best of the series so far. Its focus may have been these artists and their art, but its reach was somehow much greater.