Matthew Gray Gubler and Aubrey Plaza worked together previously on the film Life After Beth (2014). He sent her the script and asked her personally to appear.
Harry & Glenn's Grill and Bar, was named after show producers Harry Bring and Glenn Kershaw.
Hotch mentions Jack Garrett, Gary Sinise's character from the spin-off series, Criminal Minds: Beyond Borders (2016).
A picture of a guy with a shoe on his head is shown in this episode. On a previous episode, Garcia promises an old boyfriend a picture of her and Morgan with shoes on their heads, if he wins.