Perry Knotts/Getty Images The Traitors season 4 cast not only had to deal with backstabbing fellow contestants - but incurring the wrath of Taylor Swift's fan base as well! The Peacock reality competition returns on Thursday, January 8, with Swift's future mother-in-law, Donna Kelce, leading the new batch of contestants. Promoting the new season on the Wednesday, January 7, episode of Jimmy Kimmel Live!, host Alan Cumming admitted that Donna's adjacency to the pop superstar left some other stars worried about trying to vote her out.