 Director Harley Cokeliss (qv), who was a friend of Frank Oz (qv)  having worked with him on _"Muppet Show, The" (1976)_ (qv), visited  the set towards the end of filming when the production team were  struggling to get everything in the can before they ran over  schedule. Cokeliss was hired on the spot as an additional director  and is credited as one of the Second Unit Directors.