Trivia: The shot of Tooms going down the chimney to reach his fourth victim was not done by any visual effects. A contortionist named Pepper actually squeezed inside, and then the sounds of bones cracking and snapping were added later. Confirmed by co-executive producer Robert Goodwin.
Trivia: Doug Hutchinson is one of the two actors that played the character of Tooms, a liver eating mutant, in the episodes "Squeeze" and "Tooms." Hutchinson is actually a vegetarian, or was at the time. After filming "Tooms" he sent the liver of an animal to Chris Carter as a thank you for the opportunity to play a character on "X-Files."