Palm trees can be seen next to the house of the cult. Palm trees don't grow in Pittsburgh.
Langly banters with Frohike about his professed '60's counter-culture experiences by asking, "Before or after you partied with The Rolling Stones at Altamont?" To which Frohike replies, "Altamont was in the '70's." However, the event they are referring to, the infamous Altamont Free Concert, took place Dec. 6, 1969.
When introducing himself to Dr Bormanis, Doggett also introduces Assistant Director Skinner as 'Agent Skinner'