Early on in this episode, Benson mentions to Amaro that there was a murder a few months back on the carousel. This is a reference to season twelve's Pop (2011)
This is the first episode where Olivia is seen carrying a special magazine for her service weapon, the magazine has a small NYPD Detective's shield attached to the base, this was something given out as a commendation to detectives who excelled in their duty.
In this episode, Timothy Busfield plays a man named Daniel & in The West Wing, his character's name is also Daniel (Danny).
Cragen mentions that his deceased wife, Marge, had a miscarriage and that they had considered adoption before she passed away. However, it is unclear if Cragen's statement was true or part of his undercover story.
Cragen jokes to Amaro and Cabot about how long it has been since he went undercover. However, he was briefly undercover in the season 2 episode Taken (2000), which was about eleven years ago.