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: When Ralph keeps telling Coach Buck not to change his game plan, Ray doesn't listen and Ralph shouts that he's making a big mistake. Then when the two other teachers walk past Ralph, as he starts to follow them we can see two T-marks on the ground where Ralph and Ray had been standing. (00:14:15)