Goofs

There was no blood on Will's teeth and mouth after he kills the deer.

When Will is talking with Maude in his office, he puts on his glasses. In the very next shot, he is not wearing them.

Shortly after Will Randall told Laura Alden about what happened to him with the wolf two days before during the full moon, there is a view of the moon. But the moon is already only half full and, moreover, the moon is in the growing phase.

When Will hits the wolf with his car, the shot clearly shows the wolf being hit fully and squarely with the front bumper of the vehicle, which would have thrown the animal forward or caused the car to run over it. In the next shot, the wolf is squarely hitting the windshield.

Laura's pantyhose keep changing throughout the last shots of the film.

In the opening sequence, when Will is driving his Volvo, the sun is setting and the full moon is rising in the same part of the sky. The moon should be black, or be rising on the opposite side of the sun.

When Will, as a wolf, kills the deer, he does so by jumping on it from above. But wolves are NOT ambush predators (this is how cats, such as a cougar, will kill). Rather, wolves are endurance hunters. They will chase down their prey, wear down their prey, then get close enough to slash at their sides and groin in order to weaken their prey. As their prey do weaken, the pack will then surround their prey and eviscerate them. When the animal finally drops, they will then finish them by ripping out their throat. This is how wolves hunt: pursuit, NOT ambush. *Will isn't an actual wolf, but a werewolf, which is partly human. Typical wolf behavior is learned from other wolves, so Will would never have learned the "right" way to hunt.*

When Will calls Laura to apologize and explain his running off the previous morning, he complains that he can hear her toweling her hair. This is supposed to illustrate his heightened perceptions. The trouble is, that telephones of the kind used in the film, purposely limit the audio frequencies they pass back and forth, to a narrow range in the human vocal spectrum, in order to reduce interference. Even with superhuman hearing, Will would not be able to hear sounds that were blocked from transmission.

When Will, as a wolf, kills the deer, he does so by breaking its neck. But wolves chase down and eviscerate their prey. When their prey drop from weariness and loss of blood, they will rip out their throat, finishing off their prey. They do not, however, break their prey's neck. That is how cats kill (by biting the back of their prey's neck and crushing their vertebrae).

Will kills a Mule Deer, a western species, in New York State.

When Will is at Laura's place and turns, he races through the woods chasing a deer. As he does so the night sky can be seen as being bright and beams of sunlight reach the forest floor. Obviously the film crew used a filter to darken the scene and give the appearance of night. BUT the night sky is NEVER bright. Rather it is black, quite black. While areas near urban areas city lights will lighten the clouds, the sky itself remains black and renders the forest floor indistinguishable. However, it would not have done to have had Jack Nicholson trip and break bones while running through the woods at night, even a woods lit with artificial light.