Matt Robinson as Gordon (Track 9)
Hal Miller as Gordon (Track 12)
Loretta Long as Susan
Bob McGrath as Bob
Will Lee as Mr. Hooper
Sonia Manzano as Maria
Jim Henson as Ernie and Kermit the Frog
Frank Oz as Cookie Monster and Grover
Jerry Nelson as Marty and Mr. Snuffleupagus
Carroll Spinney as Big Bird and Oscar the Grouch