Criaturas rastreras

Jenna Fischer, who was married to Gunn at the time, was not originally part of the cast. The actor in her role begged to be released from his contract because he had an offer to shoot a pilot, so Gunn let him go rather than have a performer on set who didn't want to be there. Gunn swapped the character's gender and gave her a few more lines. By the time the movie was released Fischer had become immensely popular from The Office, so she was the one who went on The Tonight Show the night before the film opened.

When the zombies grab Starla from Bill's wrecked car, Bill calls "Carla, Carla!", instead of Starla.

At the very end of the credits there is an additional scene involving a curious cat and the remains of the alien slug creature.

The film was heavily censored by the CBFC in India for a 'U/A' (parental guidance) rating.

• Deleted the visuals of people eating flesh.
• Deleted all the visuals of people using word "fuck" and "bitch".
• Deleted the visuals of blotted woman breaking up.
• Deleted the visuals of of blood soaked face and visuals of lady spurting blood.
• Deleted the visuals of the lady in the tub (visuals from top).
• Deleted the visuals of cop shooting in leg.
• Deleted the visuals of dog attacking cop.
• Deleted the visuals of man shooting cop.
• Deleted the visuals of cat licking flesh.
• Muted the following words: Fuck, cock and son of a bitch.
• Delete the visuals of Grant and Starla making in bed.
• Deleted the visuals of Starla in bathroom, Grant approaching, and insects coming out from Grant's body.
• Deleted the visuals of infected Grant and Brenda in bed, making love.
• Deleted the visuals of Starla is seeing dead lying dead cat.
• Deleted the visuals of Grant trying to molest a lady.
• Deleted the visuals of police officers are looking at a crushed dead body.
• Deleted the visuals of Mayor going out of a room when Brenda is busted, and insects flooding out in the open.
• Deleted the visuals of a lady in bath tub screams after a bug is seen in the tub.
• Deleted the visuals of a man hit by a car and Mayor saying "bitch is hardcore".
• Deleted the visuals of a woman hitting a dog and saying "motherfucker".
• Deleted the visuals of men and women eating flashes.
• Deleted the visuals of Starla looking at insects.
• Deleted the visuals of creature wrapping Starla including her stabbing the creature and falling aside.
• Deleted the visuals of police officers entering the room full of creatures.
• Deleted the visuals of creatures and infected people. Police officers entering the room, filling gas into the creatures. Starla shoots. Creature is blasting into fire.

Featured in Fangoria Presents: Slither Behind the Scenes (2006)