Awesome numbers: over a million miles, the equivalent of 42 times around the globe, have been traversed by Her Majesty the Queen, enabling visits over the past seven decades or so to 117 different countries. No one has reigned longer nor travelled further.

You might consider it odd that a man whose wife spends half the year in Hong Kong without him hasn’t managed to get around to catching a plane from Heathrow to visit her in the Far East, but that is the case with Jonah Mulray, the stressed-out protagonist of Strangers. Jonah’s excuse for his marital negligence is that he’s “scared of flying”.

Emcee Michael Palin, as William Makepeace Thackeray himself, introduces us to the show: “Yes, this is Vanity Fair; not a moral place certainly; nor a merry one, though very noisy.” All his major characters – or “puppets” – are riding a fairground carousel. They – and very soon, we – are having a great time.

In the ever-expanding field of broadcast, it’s easy to get lost in the deluge of product raining down from swaggering global providers who sometimes seem to have more money than critical acumen.

Belatedly picking up from where series 2 of The Bletchley Circle left off in 2014, this comeback version has a go at transporting a couple of the original characters to the Californian West Coast, where they embroil themselves in the hunt for that old chestnut, a serial killer. On the evidence of this first of four episodes, it would be difficult to conclude that their journey was really necessary.

So it’s back to London’s Bishop Street police station for a third series of screenwriter Chris Lang’s cold case saga. The understated rapport of lead duo DI Cassie Stuart (Nicola Walker) and DS Sunny Khan (Sanjeev Bhaskar) has become one of TV’s mini-treasures, and it was all present and correct in this opening episode.

Addressing the baying media on the steps of the courthouse after being acquitted of murdering his wife, for which non-crime he’d spent the last seven years in prison, David Collins (Lee Ingleby) was a bitter and angry man. He wanted to expose the people who’d fitted him up, he wanted his children back, and he aimed to find out who really killed his wife Tara.

QCC isn’t the name of a new football club, nor some higher qualification for those toiling at the Bar, but stands for "Queen’s Commonwealth Canopy". Had you heard of it? On the eve of the Commonwealth conference, along came Jane Treays's gently hilarious, and finally rather tender film to fill in the gaps. 

When ITV scheduled this new series of The Durrells for mid-March, they probably didn’t imagine it would coincide with the return of the Beast from the East, with its blizzards and plummeting temperatures. Under these deep-frozen circumstances, what could be more reassuring than to batten down the hatches and take a trip to the glittering Mediterranean and the mountains, blue skies and historic architecture of Corfu?

Marcella’s writer Hans Rosenfeldt was the creator of Scandi classic TV drama The Bridge, the one that made detectives with emotional disorders the flavour du jour, but you do have to wonder what kind of police force would continue to employ DS Marcella Backland (Anna Friel). On a good day she’s merely rude, argumentative, whiny and confrontational.