Rose's dentist is named Dr. Norgan. Originally the writers had named him Dr. Lou Morgan, however, with Lou Morgan being a common name NBC could not clear it with their legal department due to their being doctors in Miami with that name. Thus they changed it to Norgan which is not a common name.
The book that Dorothy starts to read to Kevin in the hospital is A Tale of Two Cities by Charles Dickens.
Robert Costanzo and Christopher Daniel Barnes have both been involved with DC and Marvel. Costanzo voiced Harvey Bullock in Batman: The Animated Series and Barnes voiced Peter Parker/Spider-Man in Spider-Man: The Animated Series.