Season 4 (https://jacksonupperco.com/2015/06/30/the-ten-best-threes-company-episodes-of-season-four/) (1979-80), in case you're wondering, was Suzanne Somers' last full season on Three's Company. And it was there, in which many viewers would argue (https://www.reddit.com/r/threescompany/comments/1snjxp3/how_do_people_feel_about_how_chrissy_was_dumbed/) that this is when Chrissy's character became (https://www.reddit.com/r/threescompany/comments/1snjxp3/comment/ognxclv/) extremely Flanderized (https://tvtropes.org/pmwiki/pmwiki.php/Main/Flanderization). Basically, Chrissy went from merely being naive to flat out dumb.