The originally scripted ending had Castillo and Mai Ying parting ways during the day, with Castillo leaving first. This was changed to the broadcast ending, with Mai Ying walking away from Castillo in the evening.
This episode was the first shot for season five, but was aired third due to the necessary resolution of the Sonny Burnett Arc.
Because of Crockett's recovery from his trauma, he only appears for about two minutes in the episode.
It is implied Cortez finally breaks May Ying by sexually assaulting or perhaps even raping her -he is seen putting his shirt back on afterwards, while Rivas quips, "I should have thought of that before. No woman could tolerate you."
When the Lt. takes the .45 from the desk, he drops the magazine, clears the chamber. The last thing he does is pops the firing pin out of the slide. Nice one.