Visible crew/equipment: Near the end of the movie, before they turn into wolves, you can see the reflection of the crew in the window.
Other mistake: Gwen regrets getting Lawrence involved, saying that if she had never sent him that letter, he would still be in New York. She sent Lawrence a letter when Ben went missing in the theatrical version but, in the extended cut she went to tell him in person instead. Yet the "letter" line is retained in both versions even though it doesn't make sense in the latter.
Gwen Conliffe: It is said, there is no sin in killing a beast, only in killing a man. But where does one begin and the other end?
Trivia: Maybe more coincidence than trivia, but towards the end of the film, Gwen shoots and kills the Wolfman/Lawrence Talbot - in effect, beauty kills the beast. In Universal Studios' other major classic monster movie, King Kong, the beauty kills the big ape, albeit indirectly.
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