Mrs. Adler walks in singing "Good Morning, Good Morning". Bobbi Adler is played by Debbie Reynolds, who sang the same song in Singin' in the Rain (1952), and also starred in The Unsinkable Molly Brown (1964).
In the opening of the show Jack has rented Star Wars. Guest star Debbie Reynolds (Bobbi Adler) is the mother to Carrie Fisher (Princess Leia in the Star Wars franchise).
Debbie Reynolds was the first and only guest star to appear in all eight seasons of the show in its original outing.
The title of this episode is a nod to one of Debbie Reynolds' signature roles, The Unsinkable Molly Brown (1964).