Having been a source of obstruction and resentment to his new superior all along, Lieutenant Flynn permanently transfers to Brenda's division in this episode.
Brenda speculates sarcastically whether a victim trained for her alleged suicide with the Cirque du Soleil. Cirque du Soleil is a Montreal-based circus/acrobatics troupe known for their modern approach to the circus, mixed with dance, acrobatics and music.
The first appearance of the character Bill Croelick; he reappears during season 4.
This is the first instance that Jefferson Mays has played a killer doctor; the second time was on Law & Order SVU as the cross dressing killer Dr Carl Rudin.