Revealing mistake: A chalk outline on the parking garage wall where the actor playing the alien that just got shot and disintegrates is supposed to place his body and limbs for the special effects (the disintegration) is visible. The actor placed his body just outside the chalk outline, and the arms were not in the correct positions.
Revealing mistake: The effects of the wind blowing at Gale Frazer's Ranch are obviously being produced by a wind machine as only targeted areas of the ranch set are having wind blown at them.
Revealing mistake: In the boiler room fight scene between Wilk and Gilman, the stuntman for actor Don Gordon (Gilman) is obvious by sporting more hair than he should have.
The Spores - S2-E7
Revealing mistake: Gene Hackman's and Roy Thinnes' stunt doubles are obvious during the fight scene in the diner.
The Prophet - S2-E11
Revealing mistake: The cracked pattern in the rear window caused by Vincent's gunshots is a post-production special effect.
Task Force - S2-E16
Revealing mistake: The body of the alien is obviously a dummy after it falls out the helicopter.
Task Force - S2-E16
Revealing mistake: The eyes of the corpse of William Mace blink as the ambulance medic covers the body with a blanket.