After graduating from college, the Muppets head to New York with their musical revue and discover that producers aren’t eager to back a show starring a frog and a pig. The third big Muppet film was directed by Frank Oz, also the voice and hands of Miss Piggy, with cameos by Liza Minnelli, Gregory Hines and Brooke Shields. Tomorrow Theater screens it as part of its family program, a reason for everyone to go to the movies together, from the youngest to the grandparents.