 Boyos severed head in the episode "Eater" was produced by first  taking a cast of actor Glyn Morgans own features and then  reproducing this in wax. This was then worked on sculpturally to  create the torn flesh look of the neck. The wax copy was then molded  in fiberglass giving a negative mold from which a skin of silicone  was then produced. This skin was then painted using reference photos  of Glyn. Eyes for the head were hand