The new series of The Traitors is already back on TV, with different dates depending on which version you mean.

UK version (BBC)

For The Traitors UK, the new fourth series launched on New Year’s Day 2026 at 8 pm on BBC One , with episodes then available on BBC iPlayer after broadcast.

  • Episode 1: Thursday 1 January 2026, 8 pm.
  • Episode 2: Friday 2 January 2026, 8 pm.

So if you’re in the UK and asking “when is the new Traitors on?”, it’s on BBC One at 8 pm , with catch‑up on iPlayer the same night.

US version (Peacock)

If you meant the US The Traitors (with Alan Cumming), Season 4 premieres on Thursday 8 January 2026 , with the first three episodes dropping together at 9/8c on Peacock.

  • Three episodes on 8 January 2026.
  • Then new episodes weekly on Thursdays until the finale on 26 February 2026.

In short: UK fans – New Year’s Day 2026 at 8 pm on BBC One; US fans – 8 January 2026 at 9/8c on Peacock.

TL;DR:

  • “New Traitors” UK: Thursdays and Fridays from 1 January 2026, 8 pm, BBC One + iPlayer.
  • “New Traitors” US (Peacock): 8 January 2026, 9/8c, first three eps then weekly Thursdays.

Information gathered from public forums or data available on the internet and portrayed here.