less (often by giving  his lines to Larry Tate). Most sources tend to assume York missed  thirteen episodes from his back pain issues, when in reality, most  of the episodes York "missed" were actually filmed after he had  already left the show (in season five). They were then aired mixed  with episodes he had completed. At least one of the two episodes he  missed in season three had nothing to do with his back pain issues,  but was because his father had died.