Janet is attacked by a 5ft Moth. (How Green Was My Ollie)
The 5ft Moths are a species of giant moths native to a galaxy where George moved Earth. He noted that in a world with no more global warming, no need for an ozone layer and guranteed harmony with nature, the 5ft Moths were the only bad thing about the change. Saying this just before Janet was menaced by one of them. (How Green Was My Ollie)
It is likely that George moved Earth back as the destruction of the Moon was mentioned in Top of the Table.