The Marriage of Lupin III - S1-E1
Revealing mistake: When the camera pans through some of the gossip columns involving the socialite bride of Lupin, the text is entirely in Latin (probably Lorem Ipsum filler). Obviously no Italian gossip magazine, or any mainstream magazine, is written in Latin. (00:04:20)
Not Kansas - S3-E21
Revealing mistake: As the guy fires the machine gun at Guardian, there's a closeup of bullet casings falling to the ground, but they're not just empty casings, they're fired blank rounds.