Continuity mistake: Rodney says that he picked up the money off the table when they were trying to escape from the police, yet if you look closely he never goes near it. And he never has another chance to pick it up.
Reseda Rose - S1-E6
Continuity mistake: When Ralph is flying to Simpsons house, he continuously flies over the same area 5 to 6 times...meaning it is just reused footage. (00:20:50 - 00:21:40)
Tiptoe Through the Penfolds - S5-E3
Continuity mistake: Although Danger Mouse is supposed to be on his own, when he turns a corner in the car, in the overhead shot, you can see Penfold sat next to him.