Last week, I found myself listening to a fascinating podcast in which scientist and author Dr Simon Singh explained some of the staggering feats of codebreaking that were performed at British spy headquarters Bletchley Park, during the second world war. While gifted mathematician Bill Tutte was cracking the Nazis' Lorenz cipher system - his findings would lead to the development of the first pre-computers - another maths genius, Alan Turing, was busy decoding messages sent from the German Enigma machines.

The work of those at Bletchley Park probably shortened the war by a few years, but it was Turing's sad and tragic personal story that informed the 2014 Oscar-nominated movie The Imitation Game, in which the logician was played by Hollywood's man of the moment, Benedict Cumberbatch.

Although it's hard to believe there is much we don't already know about the chisel-cheeked superstar, CNN's Talk Asia catches up with the actor in Shanghai to dig that little bit deeper. Juan Fu ("Curly Sherlock", as Chinese Cumberbitches call him) talks about Turing's legacy and portraying him in the movie, and opens up to the news channel's Anna Coren about his image and the charities close to his heart. The "sexiest man alive" also reveals … sorry, you'll just have to tune in at 4.30pm on Thursday (with various repeat showings each day through to September 13) to find out.

Oh dear; from renowned logicians and an educated actor to … a Celebrity Big Brother winner who leaves behind the kebab shops of northeast England to journey around the world, to learn about people and cultures as host of new travelogue series The Charlotte Crosby Experience (TLC, Tuesday at 8pm). Who the hell is Charlotte Crosby, you may ask, and you'd be right to. In a day and age when all it takes to be given one's own television show is to get "mortal" (Geordie slang for "blind drunk") and flash a few naughty bits, Crosby apparently "shot to fame" in the MTV reality series Geordie Shore. That is a show I am gutted to have missed, but after watching Ms Crosby's "experience", I've got a pretty good idea of what it must have been like.

This week's premiere follows our down-to-earth travel guide to Japan (the capital of which she understands to be Korea, and where she hopes to visit the Great Wall), where she learns to become a geisha while insulting the locals with her worldly ignorance. Having never heard of our ditzy Charlotte before, I have no idea whether she is putting in a fine acting performance or if she really is as stupid as a bag of hammers. But it's all played for laughs and with very little menace, and as she embraces the absurdity of a foreign land, an affable and bubbly personality begins to shine through Crosby's fake tan.

In the coming weeks, she will make her way to regal India, to take in a traditional wedding ("It's like a rainbow has been sick everywhere"); scoff raw walrus meat with some shell-shocked Arctic Inuit; and visit Manitoba, where she will experience the strict religious lifestyle of the Canadian Hutterite community. By the time Crosby returns home to Tyne & Wear, in the fifth and final episode, she'll no doubt have plenty of stories to regale her family and friends with - tales of wonder from China's Mount Fuji and the frozen wastes of Rajasthan.

Also being tracked everywhere by a fly-on-the-wall camera crew this week are the Young Vets (above; TVB Pearl, Tuesday at 8pm): 10 final-year students at the University of London's Royal Veterinary College who are close to becoming fully qualified surgeons. The young animal lovers are now ready to put down their textbooks and get their hands grubby as they take up placements on working farms and in animal hospitals.

While there are plenty of fluffy pets and cute animal stories, the focus is on the students' inability to cope with the stress of real-life scenarios. Cue tears and meltdowns as basic techniques are forgotten, heart strings are tugged and hands are placed in warm orifices for the very first time.

If you're a pet owner, it's not entirely reassuring to discover that a freshly qualified vet doesn't know a cat's arse from its elbow (do cats even have elbows?), but, of course, it's all shot in a way that makes for good TV (on what seems like a very tight budget) and everyone comes out smiling in the end.

Mark Peters