The cast of S.W.A.T. has weathered multiple cancellations while continuing to advocate for more seasons of the show - but that doesn't mean everyone is returning for the surprise spinoff. Based on the 1975 TV show and 2003 film adaptation of the same name, S.W.A.T. centered around the Los Angeles Police Department. The CBS series premiered in 2017 and aired six seasons before it was picked up for a seventh and final season. CBS ultimately reversed that decision and S.W.A.T. returned for season 8.