Matty talking about Attila the Hun during her motivational lecture is a play on the fact that when she was introduced, she was nicknamed "Matilda the Hun" because of her fearsome demeanor.
'Henry Ian Cusick' and 'Levy Tran' are now credited as series regulars. Tran was credited as a guest star in her previous appearances.
When Bozer first realized Mac and Desi liked each other last season, he put their names together: Mac plus Desi = Messy. When Mac is describing his breakup with Desi to Bozer, he says, "It wasn't nuclear, it was just messy." Bringing to life Bozer's initial worry if they started dating.
Joshua Leonard's character is described as a genius, previous to his role in this episode he had appeared in the 'JAGverse' in Scorpion as Mark Collins, an ex member of the genius team.
Joshua Leonard's character, Martin Bishop, has the same name as Robert Redford's character in the movie "Sneakers," also about a small team of operatives involved in cloak-and-dagger-type infiltrations.