Defenders of the Earth - Season 1 - Eps 31: The Book of Mysteries
When a two-hundred square mile area of Morocco mysteriously disappears, the Defenders investigate- sans Kshin, who is instructed to choose any book from Mandrake's library for a book report. While Kshin flips through the blank pages of a book titled "Enigmas", Flash, Rick, L.J. and Jedda enter the unexplained area and discover a primitive wall with a door in it. Suddenly the wall image appears in Kshin's book, along with an inscription telling how to get inside. As our heroes are nearly crushed by falling rocks, Kshin relays the information and stops the avalanche. Kshin, once again reading from the book, instructs the Defenders, who are now inside the shrine, to push the gold keys on the control panel, revealing the lost city and removing the jamming field surrounding the area. Mean-while Mandrake and Lothar track down a notorious jewel thief and recover the Eye of the Dragon which is missing from the wall. Back inside the shrine our heroes awaken the Sleeping God before Kshin warns them that he is unstoppable, and it looks like certain death for the Defenders. As Flash, Rick, L.J. and Jedda are about to be boiled in oil, Kshin arrives on the scene and convinces the creature that they are here to help; while Mandrake produces the crystal which will allow the Sleeping God to return home, thereby saving our Champions.
About Defenders of the Earth

Title: Defenders of the Earth
First Air Date: 1986-09-08
Last Air Date: 1986-12-05
Status: Ended
Rating: 7.5/10 (from 83 votes)
Language: EN
Seasons: 2
Total Episodes: 65
Network: Syndication
Genres: Animation, Action & Adventure
Production Companies: Marvel Productions, King Features Syndicate
Synopsis
Defenders of the Earth is an American animated television series produced in 1986, featuring characters from three comic strips distributed by King Features Syndicate—Flash Gordon, The Phantom, and Mandrake the Magician—opposing Ming the Merciless in the year 2015. Supporting characters include their children Rick Gordon, Jedda Walker, Kshin, Mandrake's assistant Lothar, and Lothar's son L.J. The show lasted for 65 episodes; there was also a short-lived comic book series published by Star Comics, created by Gerry Conway, Ross Andru and John Romita, Sr.. The closing credits credit Rob Walsh and Tony Pastor for the main title music, and Stan Lee for the lyrics. The series was later shown in reruns on the Sci Fi Channel as part of Sci Fi Cartoon Quest.
Cast

Buster Jones

Peter Mark Richman

Loren Lester

Peter Renaday

Sarah Partridge

Lou Richards

William Callaway

Hal Rayle

Ron Feinberg

Diane Pershing