Reception
The pilot episode gained 1.1m viewers (3.9% share) on BBC Four, which was over three times the channel's slot average. Critical reception for the pilot was largely positive. Several mentioned that it was only a loose adaptation of the novel, although the general consensus was that the essence of the original was maintained. Sam Wollaston in The Guardian stated "Coming to it fresh, it's a neat story about aforementioned missing cat and time travel, with a smattering of quantum physics and the fundamental connectedness of things. With a lovely performance from Doreen Mantle as the old lady/murderer. Stephen Mangan's good in the title role, too – a teeny bit irritating perhaps, but then Mangan is a teeny bit irritating. So is Dirk Gently, though – it's perfect. Funny too. Quite funny." James Donaghy, also writing in The Guardian stated "Personally I hope Dirk Gently gets made into a full series. The programme shows promising glimpses, has a strong cast and Misfits already proves Overman can write. And a BBC4 adaptation feels like a good fit – Gently being exactly the kind of playground-of-the-imagination curio the BBC made its name indulging."
The Independent published two reviews. Alice-Azania Jarvis was extremely positive, writing "...there wasn't very much you could fault about the production at all. Right down to the quirky camerawork and youthful, poppy soundtrack (who would have thought the Hoosiers could be so right in any situation?), the director, Damon Thomas, got it pretty spot-on. The result was a pleasingly festive-feeling adventure; part Wallace & Gromit, part Doctor Who, part The Secret Seven. And the best thing? There wasn't a Christmas tree in sight. Douglas Adams once claimed that Gently would make a better film character than his more famous hero, Arthur Dent. Based on last night's experience, he may well have been right." John Walsh's review for The Independent was cooler about the adaptation, although he praised Mangan's performance: "Given the talent and style on display, it should have been a scream. In fact it all seemed a little moth-eaten. Though set in the modern day, it was staggeringly old-fashioned...You could overlook these faults, however, for the joy of Stephen Mangan's performance as the titular gumshoe. With his alarmed-spaniel eyes and jutting-jawed stroppiness, his geography teacher elbow-patches and Medusan hair, he radiates mess...His ineptness as a sleuth provided some fine comic moments."
Keith Watson in Metro was also positive, although he noted "At times it felt forced, with a sense of trying slightly too hard when a touch more subtlety would have brought out the essential Adamsian eccentricity." Dan Owen of Obsessed with Film noted that the adaptation played with the idea of inexplicable situations: "Purists may grumble this isn't the Dirk Gently they wanted to see, but it's more accessible and practicable. And while Dirk Gently is certainly another gimmicky detective series (yawn), its details are unique and engrossing enough to shrug off the genre's clichés. In some ways it's a pastiche of whodunits, taking the genre's often tenuous explanations to an outrageous extreme."
Paul Whitelaw in The Scotsman noted that "Although Adams's more ambitious concepts are sidelined in favour of a more prosaic – if nonetheless enjoyable – sci-fi mystery, Overman captures at least some of the wit and whimsy of his distinctive comic voice" going on to suggest "This modestly budgeted pilot suggests potential for a series, so the deviation from Adams's originals makes sense. It also adds yet another very British oddball to the pantheon currently occupied by Doctor Who and Sherlock.