Michael's voiceover near the beginning states an operative wouldn't survive if he walks into an ambush carrying cereal. This is a nod to The Departed (2006), among other movies, where Matt Damon enters his apartment carrying a grocery bag and is shot dead in an ambush.
When Sam and Fiona meet the Step Dad for the contract payment to start work , art work in the style of Vaughn Bode' ( Cheech Wizard and one of the fairy girls) can be seen on a cinder block wall in the background.