John Casey says "damaging my calm" which is a phrase also used by another Adam Baldwin character, Jayne Cobb, in Serenity (2005).
Chuck has a poster of Tron (1982) in his room. Guest star Bruce Boxleitner starred as Tron in that film.
Devon's (Captain Awesome) last name is revealed as Woodcomb.
Guest star Bruce Boxleitner co-starred in Scarecrow and Mrs. King (1983), an earlier spy-action-comedy series about a civilian and a spy who meet under freak circumstances and eventually form an unconventional but highly successful partnership. There, too, the fish-out-of-water civilian proves to have a gift for seemingly roundabout but highly practical insights, lateral thinking, and problem-solving.
The area code for the phone number in Chuck's old birthday card is for Las Vegas.