What connects Dune, The Lord of the Rings, On the Street, Cloud Atlas, and Inherent Vice? Reply: they’re all books which have been described at one level or one other as “unfilmable”. Add to that listing, then, The Ink Black Coronary heart, the sixth instalment in a collection of personal detective novels by Robert Galbraith, a pseudonym for youngsters’s author-turned-political lightning rod, JK Rowling. Set amid the trolls and edgelords of web subcultures, this profoundly “on-line” story proves a problem for the BBC – will they be capable of flip it into one other gripping instalment of Strike?

We choose issues up within the aftermath of the occasions of 2022’s Troubled Blood: the private relationship between Cormoran Strike (Tom Burke) and his enterprise accomplice Robin Ellacott (Holliday Grainger) – a will they, received’t they of epic proportions – is as unsure as ever, however their skilled alliance stays robust. It must be. When a younger artist, Edie Ledwell (Mirren Mack), involves their company asking for help with a stalker, Robin declines to assist. However when she’s later discovered murdered, the Strike-Ellacott group are drawn right into a harmful world that revolves round Drek’s Sport, a fictitious online game spun off from Ledwell’s much-loved cartoon, The Ink Black Coronary heart. Can the key to who killed her be discovered within the recreation’s chatrooms? Or is there one thing else occurring associated to the alt-right fascists in the actual world?

Those that have learn the e book will know that a lot of the motion takes place in verbatim transcripts of chat logs from inside Drek’s Sport. Naturally, this could not make for notably scintillating tv, and so a lot of the proceedings are relocated to the actual world. The Ink Black Coronary heart is a two-sided whodunit: who killed Edie and who’s Anomie, the mysterious determine operating Drek’s Sport and, seemingly, the individual pulling all of the strings? “We discover out who Anomie is,” Strike asks Edie’s attorneys, after they’re employed to research the nameless harasser, “and what do you intend to do about it?” In any case, what could be achieved a few spooky digital presence? This can be a recreation of cat-and-mouse the place the mouse can scuttle off beneath the floorboards of digital ephemera.

There are a couple of huge points with the interpretation from web page to display. Lowering the centrality of Drek’s Sport is arguably needed, however it additionally robs the story of its most attention-grabbing dynamic: characters in the actual world – the rakish life mannequin, the disaffected former PA, the susceptible hypochondriac – might, or might not, be the voices behind the nameless individuals within the recreation. This creates an intriguing shadow play (a whoisit in addition to a whodunnit) inside the novel that’s largely allotted with in its display adaptation.

However the larger drawback is contraction. The Ink Black Coronary heart is a doorstopper – over 1,000 pages in paperback, or nearly 33 hours when you want the audiobook. Right here, it’s condensed to only 4 hours, which can’t do justice to the multi-threaded story, or the sheer quantity of attainable suspects (a few of whom solely get a scene or two earlier than the denouement). There was some even handed reducing (together with removing of one of many e book’s extra controversial storylines) however the collection remains to be caught between two stools. A much less devoted adaptation may’ve labored higher over the brief run; an extended run may’ve labored higher with the specified constancy to its supply.

Filming an “unfilmable” e book implies that compromise is inevitable. However the compromises made for The Ink Black Coronary heart each defang it and render the thriller too abridged to be really satisfying.

All the identical, each the books and their variations will not be actually about crime, however the chemistry between Strike and Ellacott. Robin, rising from a disastrous marriage (“I screwed up my marriage in lower than a yr,” she confesses); Strike, nonetheless drawn, inextricably, into the video games of his ex, Charlotte (Natasha O’Keeffe). As soon as once more, Burke and Grainger do wonderful work as folks navigating their approach in the direction of romance with all of the alacrity of the Ever Given cruising down the Suez canal. In a TV panorama the place reveals routinely get canned after one or two seasons, there’s vanishingly little room for a correct slow-burn relationship. However right here we now have one of many few convincing, and compelling, long-term love tales left to the format.

The Strike collection continues to have an old-school attraction about it. Most detective dramas lately attempt to be practical, severe and brooding – it may all be very exhausting. Strike, in the meantime, appears content material to be a throwback, which, mockingly, makes it way more refreshing.

‘The Ink Black Coronary heart’ is out there on BBC iPlayer