The cigar John Casey smokes is from a box of cigars from Costa Gravas which the Premier gives him in Chuck Versus the Angel de la Muerte (2010).
Steve Austin's character is named "Hugo Panzer". Panzer means "tank" in German.
This episode contains two guest stars who have been stars in different versions of "Superman": Brandon Routh, who played the title role in Superman Returns (2006), and Kristin Kreuk, who played Lana Lang in Smallville (2001)
When speculating on what fellow passengers did for a living, Hannah guessed that the character played by Steve Austin was a professional wrestler. In fact, "Stone Cold" Steve Austin is a retired professional wrestler.
When Casey is in the break room talking to Sarah on the phone, Morgan enters the room and asks John if he has a second ("I need a favor.").
Casey looks at him and after sizing him up responds, "Not interested." This echoes the conversation his character had with Christopher Makepeace in My Bodyguard (1980).