The Traitors has returned to TV screens with a major new twist - a secret fourth traitor whose identity has not even been revealed to viewers.

The secret traitor, who wears a red cloak instead of the usual green, has been given certain powers such as deciding which players the other traitors are allowed to murder.

The ingenious new twist changes the dynamic of the civilian series and marks the most significant format change since the show's launch in 2022.

It was revealed as the fourth regular series of the BBC show launched on Thursday, hot on the heels of the successful celebrity version, which attracted more than 15 million viewers.

The new crop of 22 players includes a former police detective and a crime novelist, as well as a mother and daughter keeping their connection a secret.