Even the greatest spy can’t fix terrible writing. Slow Horses Season 5 review from the Apple TV+ series. It’s about time someone said it. After four seasons of Gary Oldman’s Jackson Lamb carrying increasingly ridiculous plots, the show has finally collapsed under the weight of its own cartoonish buffoonery.
Critical Consensus
Slow Horses Season 5 review articles paint a mixed picture. The series “descends into buffoonery” with “frustratingly shoddy plotting” where characters behave “so illogically, and downright stupidly, that much of its suspense stems from events that strain credibility to the breaking point”.

The Daily Beast echoed these concerns, noting the show’s comedy “veering into cartoonishness” and describing it as a “wobbly return engagement.” When your spy thriller becomes more cartoon than suspense, you’ve lost the plot—literally.
Oldman Exception
Gary Oldman’s Jackson Lamb remains “perfect in the role,” with his “sloppy appearance and disgusting habits reflecting his disdainful world-weariness and belying his daunting intellect.” Even harsh critics admit Oldman delivers consistently brilliant performances, making Lamb simultaneously repulsive and compelling.
Slow Horses Season 5 consensus agrees that Oldman’s “satisfyingly bad-tempered” performance elevates mediocre material. He’s “especially cretinous and mildewed” this season, with every other phrase being “F*** off”—peak Lamb energy that the writing doesn’t deserve.

Plot Problems
The season focuses on Roddy Ho (Christopher Chung), previously a “delightful background presence” now thrust into starring role with disastrous results. Critics describe Ho as “a caricature of a caricature” whose conduct “is not merely silly but implausible.” When supporting characters can’t carry storylines, the show’s structure crumbles.

Slow Horses Season 5 criticism centers on characters behaving idiotically for plot convenience. The show “tries to sell the notion that the smartest people in the intelligence community are actually the dumbest people alive,” undermining its thriller elements with absurd decision-making.
Production Context
Will Smith departs as showrunner after Season 5, with Gaby Chiappe taking over. This transition might explain the season’s tonal inconsistencies and plot problems. New showrunners often struggle to maintain established series’ delicate balance.

The cast remains strong—Jack Lowden, Saskia Reeves, Aimee-Ffion Edwards, and Kristin Scott Thomas all deliver quality performances. However, great acting can’t fix structural writing problems that prioritize comedy over credible storytelling.
Franchise
Slow Horses Season 5 review complaints reflect broader streaming series problems: successful shows extended beyond their natural endpoints. The series peaked in earlier seasons when Lamb’s dysfunction felt fresh rather than repetitive.
Critics note that while “the performances remain superb, the script is as sharp as they come,” the show struggles with “comedy/action balance.” When your selling point becomes your biggest weakness, it’s time for a creative rethink.
Verdict
Slow Horses Season 5 review consensus suggests a series in decline despite Oldman’s heroic efforts. The Independent called it “the best group of characters on British TV,” but characters alone don’t sustain shows when plotting becomes nonsensical.
The question facing Slow Horses Season 5 isn’t whether Gary Oldman remains brilliant—he does—but whether brilliant individual performances can compensate for systematic writing failures. Based on critical reception, the answer is increasingly “no.”
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