Final Gina-centric episode of the series.
The opening shot of the train running through the Miami night has been reused from Hostile Takeover (1988), though cut differently.
"Fruit of the poisoned (or poisonous) tree" is a legal term referring to evidence obtained illegally. If the source of evidence is deemed to be faulty or illegal, then all evidence gathered due to the source is also disallowed.
When the episode was repeated on July 26, 1989, it marked the final episode broadcast during the show's original run.
Starting with this episode, the show's time slot changed from 10:00pm to 9:00pm, where it would remain until Victims of Circumstance (1989).