Spoiler warning: This article reveals details from the first four episodes of The Celebrity Traitors
"I feel awful. I didn't know what else to do! I've gone and murdered one of my best friends."
That was comedian Alan Carr’s immortal line, delivered to camera after he "killed" singer Paloma Faith in The Celebrity Traitors.
The first murder of the series was all the more brutal because the pair weren’t just on-screen competitors - they are actually friends outside the show.
And they're not the only ones who knew each other before entering the Traitors Castle.
