Visible crew/equipment: When Zaphod says his first line "I certainly didn't survive.", you can see the person who plays his third arm standing behind him.
Big Brother - S1-E1
Continuity mistake: At the start of the episode when Del walks behind Grandad's chair, the way he is holding his jacket changes between shots. (00:01:15)
Continuity mistake: Bill's car has narrow whitewall tires when he pulls off the road, but in the close-up of the tire when Ralph lifts the car, instead of a whitewall tire there's a Bridgestone tire at the front passenger side.