During the team's investigation of ghost sightings, the conspiracy-theorist character of Griz claims that what is actually being sighted is alien robots, built by the government, with technology salvaged from "Area 52." This is a call-back to the Leverage (2008) episode "The Three Days of the Hunter Job (2009)," when Parker asks if "Area 51" is real and both Hardison and Eliot insist that the true name of the secret government facility is "Area 52."
Jenkins and Cassandra work through the story of the "Westphalian Brothers", who put their own interests ahead of the The Library, just as the Loveday Brothers put their own interests ahead of family.