If it ain't broke don't fix it, and writer Heidi Thomas obviously has no intention of tinkering with the Call the Midwife formula. Virtually nothing has changed, except that there's a new character, Sister Winifred, while Chummy (Miranda Hart) is now living with her husband PC Noakes (Ben Caplan) and has a baby son. However, you can't keep a born midwife down, and Chummy's return to the Nonnatus House mothership by the end of the episode was a foregone conclusion.

As Benedict Cumberbatch's Sherlock reached the end of its latest brief span, Timeshift [****] surveyed the history of dramatic interpretations of Baker Street's finest with a wry eye, in a narrative sprinkled with nutritious facts and anecdotes.

Having brought us to the end of Homeland, Channel 4 are hoping lightning will strike twice by introducing another American series based on an Israeli original. Where Homeland was the American version of Hatufim, Hostages is derived from Bnei Aruba, made by Israel's Channel 10, who sold the format to CBS before the original had even been completed.

Why has Nordic noir been such an addictive novelty? Yes the plots are great, the locations moodily cool, the flat dialogue enigmatic. But in the end it’s all about gender. The detective who is a genius at work but clueless at life – we’ve seen it all before in a suit and tie and a battered mac. What’s different in equal-opportunity Scandinavia is that the dysfunctional crimebusters are beautiful bug-eyed Valkyries. Up north it’s the blokes who are the sidekicks.

“Her most devastating surprise ever.” Thus spake The Guardian, a quote happily slapped across the cover of the first paperback edition of Agatha Christie’s 1967 thriller Endless Night. While I wouldn’t go quite that far – that honour goes to her still startling, genre-busting The Murder of Roger Ackroyd (1926) – it’s a compelling little chiller. Small wonder that ITV wanted it for their franchise. Just one tiny problem: it’s a crime novel without a detective.

They've had Ray Winstone all over Sky this Christmas, gamely plugging this new dramatisation of J Meade Falkner's rumbustious crowd-pleaser, Moonfleet. Ray's theme is that we urgently need more quality drama with broad appeal on TV and shouldn't keep relying on worn-out cliches about drug dealers and murderers.

No definitive answers to what was "the best" of 2013 of course, and I daresay opinions will differ wildly. For instance, despite the plaudits showered on it elsewhere, I felt that Broadchurch stretched itself too thin after showing initial promise. An increasingly acute allergy to serial killer dramas meant I couldn't get too involved with Tony Grisoni's Southcliffe, let alone The Fall, with its extended, voyeuristic murder scenes.

There’s a wonderful moment in Bruce Reynolds’s autobiography when he describes what became of his mate, a fellow train robber who had fled to Canada but was hunted down by the enigmatic Tommy Butler. Four and a half years after the Great Train Robbery in which crooks made off with £2.6million, Detective Chief Superintendent Butler had come to arrest Charlie Wilson and was knocking on his door.

Though greeted ambivalently when it made its debut at the end of 2012, Ripper Street has looked increasingly like TV's undervalued secret weapon as it has surged purposefully through this second series. Maybe the title was misjudged, suggesting it was just another gruesome and mist-shrouded Victorian murder mystery. Turns out it was much more than that.

Sidse Babett Knudsen, alias the absurdly photogenic Danish Statsminister Birgitte Nyborg, provoked gasps at the Nordicana festival in London last June when she revealed that she was no longer Prime Minister in series three. And indeed, as the curtain rose on episode one, we could see that she was not.