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)
Visible crew/equipment: After Ralph's interference with the unmarked police car while he's inside the manhole, when it cuts to the high school Ralph asks if anybody has seen Tony, and just as the camera passes Rhonda the T-mark is visible on the floor near the other female student's desk. In a few moments Ralph will walk over and stand at that spot. (00:07:45)