The story idea and basic script for “Sisters at Heart” was created by 22 African-American 10th graders in Marcella Saunders’ English class at Jefferson High School in South Central Los Angeles. While the episode has a “good” story, it’d be considered politically incorrect now, since several actors appear in blackface at one point.
Bewitched actually used racism as a subplot, which was quite radical for a relatively benign sitcom. In the episode, “Sisters at Heart,” this racism-based plot device occurs because Samantha casts a spell on a racist client of Darrin’s, in which he is supposed to see everyone, even himself, as having black skin.
Since CGI didn’t exist in the 1960s, stagehands worked hard to produce Samantha’s “magic.” If she wanted to quickly tidy up the living room, Elizabeth Montgomery would stand in place with her arms up while the director yelled, “Cut!” and stagehands frantically ran to remove the clutter.
Because there was no CGI, and everything had to be manually done and moved on set, Elizabeth was expected to keep her arms in the same position while the director yelled cut and everyone moved around her. She was allegedly allowed to have crutch-like devices to help keep her arms up for long periods of time. She was only allowed to lower her arms and continue the scene when the director yelled, “Action!”
The famous song actually has lyrics! The lyrics are never sung over the opening credits, but the theme song for Bewitched actually had lyrics. Some of the lyrics go, “Bewitched, Bewitched, You’ve got me in your spell. Bewitched, Bewitched, You know your craft so well.”