
Continuity mistake: When Shaggy gets out of the car on the red carpet, he has a drink in his hand with a straw, but when Scooby drinks out of the cup there is no straw. (00:02:30)
Visible crew/equipment: When Fred and Daphne are held by the Tar Monster, you can see a crew member hiding in the background.
Continuity mistake: C.l Magnus takes the cigarette out of his mouth three times.
Answer: Yes! There was a real Heather Jasper Howe! Like the fake Heather Jasper Howe's True Identity is Jonathan Jacobo! He was arrested with Ned.