Other mistake: The actor playing John F. Kennedy in no way resembles the late former President.
Revealing mistake: After Hannah draws vials from the suspected bespeckled killer, he rushes through the hospital ward with no visible markings or needle pricks on his arm.
Bad Fortune - S11-E5
Factual error: This episode includes a 1990-1991 Buick Lesabre as a background vehicle, while the season is set in 1981. (00:02:10)
Factual error: The same 1990-1991 Buick Lesabre seen in a previous episode appears in the background of the scene. The season is set in 1981, roughly a decade before this car would've been in production. (00:11:01)
Answer: He flew back a few times to be with her as mentioned in their fight.