- For other uses, see Castor.
In 2277, Castora was part of a rescue party that entered a group of ancient structures on the surface of Varda III to search for Pavel Chekov's missing security team. He supervised a group of security officers in Leonard McCoy's search team and was quick to assess the deployment of the rescue party as a pincers formation. Castora thought that the structures were municipal rather than residential, and might have had some religious function. He told McCoy that he'd had little experience on alien planet first landings. (TOS - Plot-Your-Own Adventure Stories novella: Distress Call!)