Kieth's car is a Hudson Hornet.
The beautiful Annette O'Toole plays Carol, who identifies herself as Keith's girlfriend, with no disagreement from Keith, who even takes her to the prom. However, after this episode, Carol is never seen or mentioned again.
The title is based on the first verse of "The Twelve Days of Christmas" which is an 1780 English Christmas carol about "true love' who gives increasingly grander gifts given on each of the twelve days of Christmas.