When you’re hot, you’re hot.

It says something about the state of television that sooner or later every actor has to play a cop or a spy. Latest in line is Carey Mulligan, starring as DI Kip Glaspie in David Hare’s new four-parter Collateral.

McMafia has taught us to recognise one thing – you might call it the “Norton stride”. As the charismatic Alex Godman, James Norton has been advancing, confidently at screen centre, towards one challenge after another, and they have been coming (mildly put) from all sorts of unexpected quarters. He’s dealt with everything by pressing onwards, ignoring advice from all and sundry.

When first announced, Derry Girls seemed a strange prospect. Derry during The Troubles wasn’t an obvious choice for a sitcom; neither was writer Lisa McGee, whose only previous comedy outing London Irish was slammed for negative stereotyping.

Happily, there’s hope for Spiral junkies – as series six ends, we bring you news that series seven has just gone into production. This is just as well, because these last dozen episodes have been an object lesson in how to make TV drama for the mind and body, nimbly evading cop show genre-pitfalls to bring us carefully-shaded characters operating within a Venn diagram of overlapping grey areas. Big kudos, yet again, to showrunner Anne Landois.

Despite horror’s omnipresence in cinema, British television has been somewhat deprived of jump scares. Every couple of years there’s an anomaly, such as Sky’s The Enfield Haunting or ITV’s Marchlands, but nothing has caught the public’s imagination – not since the innovative but controversial one-off Ghostwatch.

No doubt McMafia has its strengths, but it’s like a mug of Horlicks compared to the grappa-with-aviation-fuel blast of Gomorrah (Sky Atlantic). The Naples-set organised crime drama takes no prisoners. It gives no quarter, and expects none.

After a mysterious mid-season break which seemed to catch everyone by surprise, Strike Back’s sixth season belatedly bounces noisily back. So far the story has ricocheted around the Middle East before detouring to Hungary, where our indestructible Section 20 operatives just managed to save “Mac” McAllister (Warren Brown) from being hanged by the fanatical Magyar Ultra extremist group.

The “insider’s guide to the music business” tag attached to Hits, Hype and Hustle: An Insider's Guide to the Music Business (BBC Four) dangles the carrot of all kinds of clandestine scams being exposed, such as extortionate recording contracts, systematic chart-rigging or Mafia rackets involving cut-out records. Instead, this episode was merely a meander through the history of live performances in rock music.

Talk about laughter in the dark. With every successive episode, the fourth series of Inside No 9 (BBC Two) has perceptibly turned a shade blacker. "Zanzibar" was a festive farce mashing up half the plots of Shakespeare from Macbeth to A Comedy of Errors. "Bernie Clifton’s Dressing Room" was a mournful reunion with a twist featuring a failed comedy double act. "Once Removed", told in reverse like Pinter’s Betrayal, featured a murder hit gone hilariously wrong.