The Assassin

What Is The Assassin About?

Keeley Hawes stars as Julie, a retired assassin who's spent years keeping a low profile on a quiet Greek island. When her estranged son Edward, played by Freddie Highmore, turns up looking for answers about his father, the reunion doesn't stay peaceful for long — Julie's past catches up with both of them, forcing mother and son onto the run together and into a conspiracy that puts everything between them to the test. The Assassin is available on Acorn TV.

Season 1 is part of British TV Hub's British TV autumn 2026 preview.

Cast

Keeley Hawes, known to British TV Hub readers from Bodyguard and Line of Duty, leads as Julie, with Freddie Highmore — in his first major TV role since The Good Doctor — as her son Edward. The supporting cast includes Gina Gershon, Jack Davenport, Alan Dale, Gerald Kyd, Devon Terrell, Richard Dormer, and David Dencik.

How Many Seasons?

The Assassin has one season of six episodes so far. It first aired in full on Prime Video in the UK in 2025, came to the US on AMC+ in November 2025, and arrived on Acorn TV in September 2026. Prime Video has renewed it for a second season.

Is The Assassin Worth Watching?

If you like a thriller built on a strong central relationship rather than pure action, this one delivers — Hawes and Highmore's mother-son dynamic carries the show, and the Greek island setting gives it a distinctive look among British thrillers. It comes from the Fleabag and The Tourist writing team of Harry and Jack Williams, which is a reasonable indicator of its tone and quality.

About the show

The Assassin comes from brothers Harry and Jack Williams, the writing and producing team behind Fleabag and The Tourist. The six-episode series was filmed on location across the Greek islands.

Season 1 on Acorn TV

Season 1 arrived on Acorn TV in the US on September 7, 2026, with episodes released weekly, a slower pace than the show's original UK run, where all episodes were released at once.

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