When Pratt is talking with Chaz, he mentions the Cubs' victory the day before. In reality, the team was defeated on April 18, 2007. This error could not have been helped, however, as at the time of filming there was no way to predict the outcome of the game.
(Sarah shows up at the hospital for a vaccine)Neela: Why didn't you go to your pediatrician?
Sarah: He only takes care of little kids. Besides, I think I need a new doctor anyway. Do you know a good GYN?
(about Joe)Luka: I guess uh... his urine tested negative? Pratt doesn't think he needs a CBC?
Abby: (smiling) No. I know, you think I'm acting crazy.
Luka: No, I think you are acting like a mother -- a slightly crazy one.
The man with the failing heart was portrayed by Andy Prosky, and that character's Alzheimer's-sticken father was portrayed by Robert Prosky, Andy Prosky's father in real life.