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.
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!”