Gary Holden, played by guest star William MacDonald, is the father of Trevor Holden (Traveler 0115). During season one, very little is seen of either of Trevor Holden's parents. On several occasions he is shown to have a short temper and frequently lashes out at his son and wife. He is controlling of his wife's behavior which she tolerates stating that it is easier than arguing. Gary thinks little of his son's behavior for which the view has little context. He at one point strikes Trevor across the face when he suspects that Trevor has stolen his mother's medication.