The third series of The Traitors was first broadcast on BBC One on 1 January 2025. Claudia Winkleman returned to present the series, accompanied by the returning spin-off show The Traitors: Uncloaked, presented by Ed Gamble. The series concluded on 24 January 2025 when Jake Brown and Leanne Quigley won as Faithfuls.
In November 2023, prior to the beginning of the previous series, it was announced that The Traitors had been renewed for a third series. Applications for the third series opened in January 2024 and closed on 17 March 2024. It was confirmed that the BBC had received over 300,000 applications for the series.
The first teaser trailer for the series aired on 29 November 2024, which featured clips from the previous two series, as well as reviews from news outlets. Ahead of the series, host Claudia Winkleman teased "more knitwear", "quite a lot of tweed" and a twist that would "hopefully have viewers on the edge of their seats".
The 25 contestants competing in the series were revealed at midnight on 1 January 2025, the day of the show's launch, and featured three more contestants than the two previous series. Amongst the contestants were two sisters, Armani Gouveia and Maia Gouveia.
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Weekly ratings for each show on BBC One. All ratings are provided by BARB. The final episode of Uncloaked on BBC Two achieved a rating of 5.71 million viewers.