Factual error: Aunt Petunia says that the chalice was first seen in the Stone Age, and sends Paul and Barry back to where Stonehenge is just being completed. However, the Stone Age actually ended in around 3300 BC. Stonehenge is believed to have been constructed in around 2500 BC, which was the Bronze Age.
Chucklevision (1987)
1 factual error in season 20 - chronological order
Starring: Barry Chuckle, Brian Patton, Jimmy Patton, Paul Chuckle
Visible crew/equipment: Series 19, "Pandamonium": When Paul and Barry are trying to find the panda, Barry (dressed in a panda costume) thinks he is looking at his own reflection. You can see the camera and cameraman reflected in the mirrors, and you can also see people watching the scene being filmed.
More trivia for Chucklevision