A young boy in Pennsylvania named Tommy Conlon thinks some monsters have made their home under his bed, and his father reassures him that he's imagining things. A routine scene, except for the fact that Tommy's father makes sure he holds the door shut when the boy tries to escape the renewed monster noises. Leyla Harrison thinks there's something about Tommy and his family, since his mother stabbed herself to death and his cat also died, with Tommy saying monsters were to blame in both cases. She tells Scully about the case and convinces Reyes and Doggett to investigate; she's also resourceful enough to get Tommy's dead cat to Scully, making her reconsider her opinion that there's nothing to the case after seeing that the cat chewed a hole in his own stomach.
Doggett and Reyes think something fishy is going on after observing Tommy's father's behavior, and they're marooned at the house after their car's engine spits out blood. The agents see Tommy being held at bay by a couple of insect-like creatures, one of which regenerates into two new creatures after Doggett shoots it. At Scully's request, the sheriff visits the Conlon home...except it's not him, just some sort of blood-filled automaton. Scully figures the cat was trying to get rid of something inside of it that was causing severe pain, and decides to make the trip to Pennsylvania.
Tommy's father explains to the agents that he was trying to keep Tommy in with the creatures because they wouldn't hurt him, whereas anyone else they will. Tommy shows Reyes a picture of her with the creatures in her belly, and she finds herself with a painful infestation soon after; not surprisingly, the agents realize that Tommy is behind everything. Tommy also tricks Doggett into a void full of the creatures and makes Harrison's eyes bleed. Doggett is unhurt, since he's realized that it's all imaginary and can't hurt him. Escorting everyone outside, Doggett tells Tommy he needs to stop him, douses the living room in gasoline, and ignites it. Except that he just used water to trick Tommy, making him pass out in fear. Harrison gives Doggett a backhanded compliment, saying his lack of imagination saved them all, and Tommy undergoes psychiatric treatment to stifle his imagination: deadening his mind with a ton of TV programs.
Brian Roth, who plays Gabe Rotter, also played Tyler Jenson on CSI: Miami.
Episode Body Count
Mrs. Conlon: dies of 16 self-inflicted stab wounds in an attempt to remove a monster conjured up by Tommy.
Spanky: Tommy's cat, he claims a monster killed it as well.
I won't count the not-sheriff, since he's just a bag of blood conjured up by Tommy's imagination and that body disappears somewhere anyway.
Cumulative Body Count (196/202 episodes, 1/2 movies)
Humans: 2,204Creatures: 131
Grand Total: 2,399