Did this episode actually get Bewitched cancelled?
I'm seeing this claim on many sites.
My only comment here would be that once a sitcom starts taking itself too seriously it needs to die.
"Sisters at Heart" is the thirteenth episode of the seventh season, and 213th episode overall, of the American Broadcasting Company (ABC) fantasy television sitcom Bewitched. This Christmas episode aired on ABC on December 24, 1970, and again the following December.share
The narrative follows Lisa Wilson (Venetta Rogers), an African-American girl, as she visits her friend Tabitha Stephens (Erin Murphy), a white girl. Meanwhile, Tabitha's father Darrin Stephens (Dick Sargent), who works at an advertising agency, fails to land a million-dollar account with toy company owner Mr. Brockway (Parley Baer) because Mr. Brockway is racist and incorrectly believes Darrin to be married to Lisa's mother Dorothy (Janee Michelle). In an attempt to convince Mr. Brockway to overcome his bigotry, Darrin's wife Samantha (Elizabeth Montgomery), who is a witch, casts a spell on Mr. Brockway so he sees everyone, including himself, as having black skin.
https://en.wikipedia.org/wiki/Sisters_at_Heart