Character (https://mondovulgare.com/2019/05/29/baywatch-90s-trash-tv-reevaluated-as-cult-oddity/) backstories regularly (https://slate.com/culture/2001/05/who-watches-the-baywatchers.html) change as do motivations. They had a small pool of extra actors and used (https://www.youtube.com/playlist?list=PLzSaABvhwN1NVzkxm86VLsslYmThKtVu0) the same (https://www.digitalspy.com/tv/a820911/actors-play-different-characters-same-show/) actors for different characters all the time. For example, the actor playing Mitch’s best friend may be playing a bad guy a month later and a lifeguard’s love interest a year after that.