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.
Kung Fu Kapers AKA Ecky-Thump - S5-E7
Revealing mistake: When the pudding flies into Bill's mouth, you can see the wire pulling it.
Kung Fu Kapers AKA Ecky-Thump - S5-E7
Revealing mistake: Bill shoots tea at Tim from two kettles, but if you look at Bill's finger, you can see the trigger for the spray gun shooting the tea.