Gemma Arterton's ITV Spy Thriller 'Secret Service' Premieres to Mixed Reviews
ITV's new five-part espionage drama 'Secret Service' arrived on Monday with considerable fanfare — a slick production, an Oscar-winning director, and Gemma Arterton in the lead role — but the critical reception has been decidedly lukewarm, with reviewers praising Arterton's committed performance while finding the show itself too generic, too slow, and too reliant on familiar spy thriller conventions to make a lasting impression.Background
Secret Service is adapted from the 2019 novel by Tom Bradby, the ITV News anchor whose previous adaptation — the political thriller 'News of the World' — was a significant commercial success for the network. Bradby has spoken extensively about his ambition to create "the first proper drama of the new Cold War," drawing on his experience covering British politics and intelligence affairs to bring authenticity to the story of an MI6 officer navigating the intersection of espionage and domestic politics.
The series is directed by James Marsh, the Oscar-winning filmmaker behind 'Man on Wire' and 'The Theory of Everything' — a significant appointment that signals ITV's investment in the project. Gemma Arterton, who plays MI6 Russia Desk chief Kate Henderson, is one of Britain's most accomplished screen actors, with a career that spans blockbuster franchises, independent films, and acclaimed stage work. Her casting was widely seen as a coup for the network.
The drama arrives at a moment when the spy thriller genre is experiencing something of a renaissance on British television. Slow Horses on Apple TV+ has set a high bar for the genre, combining genuine intelligence tradecraft with sharp character work and mordant humour. The Bodyguard and Line of Duty demonstrated that British audiences have an appetite for high-stakes political thrillers. Secret Service enters a competitive landscape with significant expectations to meet.
Key Developments
The series premiered on ITV1 on Monday 27 April at 9pm and is available as a box set on ITVX. The plot centres on Henderson's discovery of evidence that a senior UK Cabinet minister may be a Russian asset, unfolding against a backdrop of a leadership contest following the Prime Minister's resignation. The cast includes Rafe Spall as Henderson's husband, a Whitehall adviser; Roger Allam as the MI6 chief; and Alex Kingston as the head of security.
Critical reaction has been mixed. The Guardian described the show as "not, in any conceivable way, fun," noting that it "struggles to differentiate itself from other spy dramas" and falls into genre clichés. The Radio Times gave it three stars, praising Arterton as "a bright light" but finding the plot's resolution "dutiful rather than dramatic." The Telegraph was similarly measured, calling Arterton "committed" but the overall production "plodding."
A particular point of criticism has been the decision to cast real ITV news presenters — including Robert Peston, Susanna Reid, Ed Balls, and Anushka Asthana — in cameo roles within the fictional drama. Critics found this "cross-promotion" distracting and argued it undermined the show's credibility as a serious piece of drama. The integration of real journalists into a fictional political thriller raises questions about the boundaries between news and entertainment that ITV has not fully resolved.
Why It Matters
Secret Service matters for ITV because it represents the network's attempt to compete with streaming platforms on their own terms — high-production-value drama with a recognisable star and a prestigious director. The mixed reception suggests that production values alone are not sufficient to distinguish a show in a crowded market. The comparison with Slow Horses is instructive: that series succeeded not because of its budget but because of the quality of its writing, the depth of its characters, and its willingness to subvert genre expectations. Secret Service, by contrast, appears to have played it safe — and in doing so, has produced something that is competent but not compelling.
For Gemma Arterton, the show's reception is a minor setback in a career that has been building steadily. Her stage work — including acclaimed performances in West End productions — has demonstrated a range that her screen roles have not always fully exploited. Secret Service gives her more to work with than many of her previous television appearances, and her performance has been consistently praised even by critics who found the show itself disappointing.
Local Impact
For viewers across the UK and Ireland, Secret Service offers five episodes of competent if unspectacular spy drama — watchable, if not essential. The show's depiction of a Labour government facing a Russian intelligence threat has a certain topicality given the current political climate, and its exploration of the tension between professional duty and family life will resonate with many viewers. In Ireland, where ITV is widely available and Gemma Arterton has a significant following, the show is expected to perform reasonably well on ITVX even if its linear ratings are modest.
What's Next
The remaining four episodes of Secret Service will air weekly on ITV1, with all episodes available on ITVX. The show's ratings trajectory over the coming weeks will determine whether ITV commissions a second series — Bradby has written two further novels featuring Kate Henderson that could provide source material. ITV's next major drama commission, the new series of Unforgotten, is expected on ITVX later in 2026. The network's autumn drama slate will be announced at its upfront presentation to advertisers in May.
Sources: The Guardian — Secret Service review, 27 April 2026; Radio Times — Secret Service review
