The Goodies and the Beanstalk - S4-E4
Continuity mistake: When the beanstalk is pushing the bath down the road there are two parked cars a blue Austin 1100 and a sliver Ford Cortina behind it, the angle changes and the cortina has gone.
Revealing mistake: While the goodies are being chased by the white kitten the wires pulling the kitten along are visible.
Visible crew/equipment: When Bill is putting the potatoes in the oven you can see a shadow of the boom mike on the diagram of the fish on the easel.
South Africa AKA South African Adventure AKA Apartheight - S5-E11
Revealing mistake: When the two guards throw Bill over the gate the dummy doubling for Bill isn't very lifelike.
Clown Virus - S5-E2
Visible crew/equipment: In the Goodies' office when Bill is taking the tomato soap out of the giant can, a shadow of the mike can be seen on the wall.
South Africa AKA South African Adventure AKA Apartheight - S5-E11
Factual error: In the South African street scenes all the vehicles seen have British number plates.