As the Metropolitan Museum of Art closes, Big Bird decides to leave his Sesame Street friends behind in search of Snuffy. Once locked inside for the night, educational hilarity ensues as Big Bird and Snuffy team up to help a small Egyptian boy solve a riddle - as the rest of the cast searches for their big, yellow friend.
- Year: 1983
- Country: United States of America
- Genre: Family, Fantasy, Music
- Studio: Children's Television Workshop, Random House Children's Entertainment
- Keyword: new york city, monster, musical, puppet, imaginary friend, art, educational, culture, egyptian mythology, locked in, sign languages, art museum, lost child, sesame street, metropolitan, searching for parents, muppets
- Director: Jon Stone
- Cast: Caroll Spinney, Frank Oz, Jerry Nelson, Martin P. Robinson, Brian Muehl, Richard Hunt