Cast[]
- Big Bird as King Leonidas
- Zoe as Queen Gorgo
- Kippi Ben Kippod as Theron
- Herry Monster as Dillios
- Oscar the Grouch as King Xerxes
- Uncle Hank as Stelios
- Moishe Oofnik as Captain Artemis
- Uncle Fred as Ephiobus
- The Big Bad Wolf as Daxos
- Mr. Grouch as Astinos
- Cousin Pepe as Loystes
- Max Mekker as Persian
- Mrs. Grouch as Oracle
- Grouch as Young Leonidas
- Merry Monster as Young Gorgo
- Bjarne Betjent as Ubor
- Grouches as Leonidas Peoples