Vollaerts knew Gene Roddenberry from their days working together on the 1950s Ziv TV series Mr. District Attorney, and contacted him when he got the word that Star Trek needed a new story editor for its third season. Despite not hiring Vollaerts for the job (which went to Alexander Singer), Roddenberry liked his ideas and recommended him to Fred Freiberger, who eventually bought his story for "For the World is Hollow and I Have Touched the Sky". (These Are the Voyages: TOS Season Three)