Well, didn't S. Steve Holland get a credit for the animation design for PYL? AFAIK, he had moved on to directing on the big screen by the time PYL finished. Similarly, Nat Ligerman (Monty's barber) got a credit on LMAD though he didn't actually work day-to-day on the show. On Classic Concentration, Bud Piper got a credit as did Victory Television, even though it wasn't syndicated.