Sidney J Furie’s 1965 film The Ipcress File is a much-loved benchmark of its period. Stylish, sinister, witty and depicting a determinedly un-swinging London, it was conceived as the flipside to the absurdly glamorous James Bond movies and pulled it off with panache. It also had Michael Caine playing the lead role of Harry Palmer, and a superb John Barry soundtrack famously featuring that mysterious instrument, the cimbalom.

ITV’s new detective mystery, Professor T, is an adaptation of a Belgian series of the same name, and was filmed in Belgium and Cambridge. Which is a bit weird since all the action supposedly happens in Cambridge.

What may have happened here is that an intriguing book has been turned into a not so great TV series. Too Close was Natalie Daniels’s well-received first novel, and she has adapted it for this ITV three-parter under her real name of Clara Salaman. She used to play DS Claire Stanton in The Bill 20 years ago.

We last saw John Simm on ITV in 2018’s Hong Kong-based murder mystery Strangers, a product from the Jack and Harry Williams script factory which wasted its exotic backdrops with a plot which mooched about in a dispirited fashion before dozing off entirely.

There comes a time when every successful formula can do with an overhaul, and that particular bell may be tolling for Unforgotten (ITV).

Anna Friel’s unstable detective Marcella Backland has been on the brink of existential burn-out ever since her first appearance on ITV in 2016, but it seems audiences have a perverse desire to see what psychological black holes she might plummet down next.

Or, What The Durrells Did Next. Writer Simon Nye, writer/director Roger Goldby and star Keeley Hawes are all veterans of ITV’s Corfu-based fantasy, and while Finding Alice superficially resembles a thriller, like its predecessor it’s more of an undemanding family melodrama once you’ve peeled away the wrapping.

Okay, so some people taught themselves the violin or wrote a novel, but under this year’s circumstances, it was inevitable that television (terrestrial, cable, online or otherwise) was going to clean up. With large chunks of the population forced to stay home, what could be more natural than to reach for the remote controller to magic up another bingeable boxset or Walter's latest noir thriller?

The seductively breathy Joanna Lumley supplied the voice-over for this hugely entertaining romp through the history of Coronation Street, celebrating “the Diamond Jubilee of the world’s longest-running soap.” Yet wasn’t the uber-posh Lumley, scion of the British Raj, a discordant choice for this long-running saga of Mancunian folk?

Neil Cross’s novel Burial was hailed for its skilful plotting and insightful characterisations, as well as its macabre atmosphere. Disappointingly, the author’s own adaptation of the book looks clumsy and uncomfortable on TV.