Bewitched (1964) : 7x13

Darrin's friends, Keith and Dorothy Wilson who happen to be black, invite their daughter Lisa to stay with Tabitha on Christmas Eve while they go away. Lisa and Tabitha want to be sisters because they get along so well with each other, but are discouraged when someone tells them that they can't be because Lisa is black and Tabitha is white. Of course, this gets out of hand when Darrin's newest client, Mr. Brockaway, visits his home. Lisa is asked to answer the door, and Brockaway gets a shock when he sees her, thinking that she is the Stephens' child! He turns Darrin down because of his bigotry. Tabitha lets Lisa in on her witchcraft and uses wishcraft to blink polka dots on both her and Lisa. Samantha then tells them that they don't have to look the same to be sisters because they are sisters at heart. Then, after a well-deserved lesson from Samantha, Mr. Brockaway admits that he is a racist and wants Darrin to handle his account as his apology.