The Night of Miguelito's Revenge - S4-E12
Revealing mistake: At the beginning of the episode, as Jim West walks away from the newsstand vendor and closes the magazine, a 1967 ad for DieHard batteries ("The DieHard Fights the Common Cold") can be seen on the right-hand page of the prop magazine, in a modern sans serif font.
Katokutai shutsugeki seyo - S1-E4
Visible crew/equipment: When Neronga is shown destroying the power station, one specific shot shows Neronga roaring while tilting its head upwards. In the next shot, two metal wires can be seen being connected on top of the head, possibly used for the previous Neronga's roaring shot. (00:19:24)