Mary's boyfriend in this episode is played by Jerry Van Dyke, brother of Dick Van Dyke, her former co-star on The Dick Van Dyke Show (1961).
Jerry Van Dyke appeared alongside Mary (and, of course, brother Dick) four times on "The Dick Van Dyke Show".
His portrayal of a love interest on MTM means Mary has kissed both brothers onscreen.
His portrayal of a love interest on MTM means Mary has kissed both brothers onscreen.
The square pendant that Mary wears on her collar is the same one that she wears four years later in the final scene during the final episode.