 The ships cook, referred to as Chef, is mentioned throughout all  seasons, but as part of a running joke, he is never seen. He makes a  small appearance in episode #2.12, "The Catwalk", but he doesnt  speak and is filmed from the waist down. Part of the reason for  eluding him is out of respect for food stylist, Dorothy Duder, who  makes all the shows food props and is therefore considered the  "real" Chef.