You can watch "The Traitors" series on several platforms depending on your location and which version you want to see:

• In the UK, "The Traitors UK" airs on BBC One and is available to stream for free on BBC iPlayer. You need a UK postal code to sign up and access it. Sky Go also offers the series with a subscription. For the celebrity edition, BBC iPlayer streams it as well starting October 2025.

• In the US, "The Traitors" (US version) streams on Peacock, which includes all seasons. Peacock hosts the UK version too but the latest season may come with some delay.

• In Australia, you can watch "The Traitors UK" on 10 Play for free with a login or on Paramount Plus for Season 1. The celebrity version also streams on Channel 10 and 10 Play.

• If you are outside these regions, you might need a VPN to access these services as they typically have geo-restrictions.

There is also a 2024 show titled "Traitors" on Netflix, about spy drama after WWII, which is different from the mentioned reality competition.

So, your best bet depending on your location and preference for the UK or US version is BBC iPlayer, Peacock, or 10 Play.