Basically the same day plays out differently because a butterfly landed on a different random person's chest. You see how each effect impacted the diagnosis of the same patient (on where lots goes wrong, one where lots goes right) but in the end the patient dies in both stories either way. Showing that even if you can do everything right, things can still go bad.
Alexthegreatbelgian t1_jcz07lc wrote
Reply to What’s your favorite time-loop / “Groundhog Day” episode of a TV show? by wet_bandits23
Does "My butterfly" from Scrubs count?
Basically the same day plays out differently because a butterfly landed on a different random person's chest. You see how each effect impacted the diagnosis of the same patient (on where lots goes wrong, one where lots goes right) but in the end the patient dies in both stories either way. Showing that even if you can do everything right, things can still go bad.