In 2269 on the Amusement Park planet, trans-droids of The Playing Cards were built by the planet's Master Computer. The Queen of Hearts ordered her soldiers use their axes and decapitate Leonard McCoy. McCoy was able to evade them long enough to get beamed back aboard the USS Enterprise. (TAS episode & Log Three novelization: Once Upon a Planet)
- In the aired episode, the Queen was escorted by only two guards, the Jack of Spades and the Jack of Hearts. In the novelization, McCoy thought the entire deck of playing card soldiers were after him.