Special Date: November 16, 1983
Aired on PBS
The cast of Sesame Street has gone on a field trip to the Metropolitan Museum of Art. Big Bird has arranged to meet with Snuffy at the museum but before he can, it is closing time. Big Bird decides to go off and look for Snuffy. Before the group can leave, they realize Big Bird is missing and run all through the museum looking for him. The chase has them going through different exhibits at high speed and missing, spotting, and chasing him. After a bit, they give up, only to find that they are locked in the museum overnight. They decide to go back out and look for Big Bird and look at all the exhibits while they are at it.
Big Bird eventually finds Snuffy and they wander the Egyptian exhibit and encounter an Egyptian prince named Sahu and his cat who have been cursed to remain on Earth and not be able to become a star like his parents until he answers the question "Where does today meet yesterday?" Every night at midnight for thousands of years, a demon (James Mason) appears to ask Sahu that and he has answered wrong every night. Big Bird suggests Sahu remain on Earth and become "the only 4,000 year old kid on Sesame Street", but later agrees with Snuffy that they should work together to get the answer.
Meanwhile, the group has split up and are all in different exhibits. Bob and Cookie Monster find themselves looking at pictures with food in them. While Cookie Monster tries to eat the pictures, Bob points out to him a sign that says "Please don't eat the pictures." He replies with "Oh, this going to be long night." He later sings the song "Don't Eat the Pictures" about this. Oscar finds an exhibit of Greek and Roman statues that have been broken by natural disasters. He looks in and breaks into song on how beautiful they are to him. Grover finds an exhibit filled with armor from medieval times and thinks a suit of Maximilian armour is a guy named "Max" and tries to befriend him by changing into his Super Grover costume and singing a song. Bert and Ernie view the painting of Washington Crossing the Delaware, to which Bert comments on the dedication of Washington and his men, but Ernie comments how he was silly to cross in the winter and should have waited until Easter or taken the George Washington Bridge.
As the night passes, Big Bird and Snuffy continue to try to figure out the answer to the question. Soon before midnight Big Bird unknowingly figures out the answer is "a museum." When the demon appears that night, the question is answered correctly and Sahu is sent to Osiris (Fritz Weaver) to have his heart weighed. When the feather to weigh his heart doesn't appear, Big Bird offers one of his to help. But when Sahu's heart is too heavy, Big Bird claims that it wasn't fair since Sahu was on Earth for 40 centuries and he was so alone his heart would be heavy, so he can't become a star.
After this, Sahu's heart becomes lighter and he is now ready to join his parents and take his cat. Big Bird and Snuffy then exit the museum, look up into the night sky, and see four stars in a straight line (representing Sahu, his parents, and his cat), and are glad that they reunited Sahu with his parents. When morning comes, Big Bird finds the group and Snuffy is not there. He left early to get to "Snufflegarden." Cookie Monster is promised anything on a hot dog stand as a reward for not eating anything in the museum, and decides to eat the entire stand.
After the credits, Big Bird is pretending to be a statue. He encourages the audience to visit their local museum, and comments on how staying perfectly still is tiring and wonders how statues do it.