A TV program called "Life As We Know It" is shown on the NBC line-up calendar. "Life As We Know It" had been an alternate title for "3rd Rock from the Sun (1996)".
The opening jazz version of the theme music and the font for the credits mimic the style of Woody Allen films, most of which are about life in New York City.
The hotel where Dick, Sally, and Harry stay is named "The Pendleton", the same name as the university where Dick teaches in normal reality.
In the episode "Portrait of Tommy as an Old Man (1998)", Mary said she had wanted to be a torch singer. In the parallel dimension, that is exactly what she is.
Harry shuffles "Will & Grace (1998)" around the TV schedule. Megan Mullally, who plays Karen in "Will & Grace", played Mary's sister, Renata, in the episode "Les Liaisons Dickgereuses (2000)".