(Photo: UCLA Library Special Collections)
Rob Justman was a director and producer for the original Star Trek series when it aired from 1966-1969. In this memo to series creator Gene Roddenberry, Justman is perturbed about 6 wigs that went missing after the second season ended.
Four of them were made for William Shatner (Captain Kirk), one for Majel Barrett (Nurse Chapel), and one for Nichelle Nichols (Lieutenant Uhura).
Justman's tone and phrasing indicate that he doesn't think these are just accidents. In this memo, which is located in the UCLA Library Special Collections, Justman is especially concerned about the disappearance of Shatner's hairpieces:
Bill Shatner borrowed all four of his hair pieces when we finished shooting. There are two new ones and two old ones. The new ones are worth approximately $200.00 apiece and the two old ones are worth approximately $100.00 apiece. Should “STAR TREK” go again next season, this no doubt means that we will have to construct new hair pieces again for Bill because he will have used both the old ones and the new ones to such an extent that they will not be photographable. This I guarantee, since it has happened to us before.
-via VA Viper