Chest Burster: The alien fungus-like organisms grow in human chests, though it ultimately bursts through a victim's throat.
Continuity Nod: Mulder is hesitant to bring Scully along due to the events surrounding her abduction, but she insists she's ready.
Genre Savvy: When the agents first enter the facility, Jason takes a swing at Mulder with an axe. Jason insists it's because he thought it was Trepkos, but Mulder knows he would've had enough time to see clearly.
My God, What Have I Done?: Mourning her death, Trepkos recalls how he convinced Jessie to join the operation to "have an adventure."
Not Himself: The guest characters insist this about Trepkos.