The Illusion of the Lethal Playthings - S1-E20
Character mistake: A toy company would surely know better: the sign outside the toy factory misspells "Pinocchio" with only one C instead of two. (00:25:20)
Character mistake: Spock says "The Queen of Hearts and her cards are characters from Alice Through the Looking Glass, Captain." They are from Alice in Wonderland. Looking Glass has chess pieces as characters instead of playing cards.