When Scully is doing the cat necroscapy with the barbecue tongs and a sharp knife, in her Marigold gloves and cooking apron, she is interrupted by a phone call. She asks the delivery guy to take over, but despite the fact that she has just been prizing open the dead and buried cat's ribcage, she doesn't give him any protection, and she seems fine to pick up the phone with her rancid cat encrusted gloves, and put it to her face. She's a doctor - the cat's been dead a while, could have had anything in its stomach, William is in an adjoining room. Her hygiene sure leaves a whole lot to be desired! Even live cats can carry diseases.
When Doggett shot the "monsters" in the beginning of the episode, a bullet hole should have appeared in the floor, but no mark was visible.
Scully: (Doing the autopsy on Spanky) Well, it would appear as though Spanky ate through his own stomach. And you have to admit, that's unusual behavior for a cat.
Scully: (To Gabe) I'm going to say this as politely as possible... Get out! NOW!
Leyla Harrison: (after admitting that she lied to the other agents) We could help a little boy. Even if this is not an X-File what could it hurt to keep going?
Doggett: I don't know about Agent Reyes, but Agent Doggett's gonna sit his tired ass down.
Scully: Woah! What the hell is that!
Gabe: Dead cat.
While Scully was doing an necropsy on "Spanky", Tommy's rotting pet cat, her apron clearly sports the words "something smells goooood!"
Jolie Jenkins makes her second appearance on The X-Files on this episode. Her premiere was in "Alone" in the 8th season. She plays an agent that is obsessed with the X-Files, Mulder and Scully.
In this episode we find Tommy uttering the famous phrase "I made this" while showing a drawing he made to Reyes. This is also the phrase spoken over the TenThirteen logo after the credits on every X Files episode.
Gabe: That's my girlfriend up there, Hoss.
He's talking to the sheriff, but the allusion is clearly to the famous and well-loved character from the TV show Bonanza, Eric Haas (Hoss) Cartwright, a loyal but rather 'plodding' man, often described as a gentle giant.