Keeper of the Ancient Ruins

Keeper of the Ancient Ruins is the 47th episode of He-Man and the Masters of the Universe, written by Lee Robert and directed by Bill Reed. In the ruins of an old city, Man-At-Arms and Professor Smallen discover the Book of Ancient Eternia, but their presence activates robot guardians programmed to protect the site.

Synopsis
After receiving a distressing message from Professor Smallen and Man-At-Arms, Teela and Adam go to investigate. As they wait for help from their friends, the Zactons freeze Man-At-Arms in time with a ray, believing him to be a threat to both themselves and the Book of Ancient Eternia. Professor Smallen convinces the Zactons to free Man-At-Arms in order to repair a damaged member of their number, named Kappa. Together the two slowly teach the book's guardians about friendship and trust. Trap-Jaw arrives at the temple to steal the Book of Ancient Eternia, only to be met by Teela and Adam, who promptly transforms into He-Man to do battle with the villain. Initially distressed at the conflict taking place in their home, the Zacton's eventually realize that He-Man and his friends seek to protect and help them, soon helping the Heroic Warriors by trapping Trap-Jaw in a time ray as they had Man-At-Arms. The episode closes with Trap-Jaw being hauled away work in the prison mines, while the Zactons share a heartfelt goodbye with their newfound friends.

Moral
He-Man: "Today we saw Professor Smallen find a great treasure. It wasn't gold or jewels, but something even more precious... knowledge. There are many places to find knowledge, and one of the easiest and best is a museum. Museums are storehouses of knowledge where you can see and learn all sorts of fascinating things. There's probably one close to you, so pay a visit. Remember, knowledge is power. And you can get the power."

Heroic Warriors

 * Prince Adam
 * Battle Cat
 * Cringer
 * He-Man
 * Man-At-Arms
 * Orko
 * Sorceress
 * Teela

Allies

 * Professor Smallen
 * Royal Guards
 * Great Bird Messenger

Evil Warriors

 * Skeletor (mentioned)
 * Trap Jaw

Technology

 * Lango Computer
 * Zactons

Vehicles

 * Wind Raider

Locations

 * Eternos - Royal Palace
 * Sands of Time
 * Snake Mountain
 * Prison Mines (mentioned)

Artifacts

 * Book of Ancient Eternia

Cast

 * John Erwin as He-Man/Prince Adam, Professor Smallen and Alpha
 * Alan Oppenheimer as Man-At-Arms, Battle Cat/Cringer and Beta
 * Linda Gary as Teela and the Sorceress
 * Lou Scheimer (credited as Erik Gunden) as Orko, Trap Jaw, Kappa and Royal Guard

Behind the Scenes

 * Script was approved May 16th 1983.
 * This is the only time we see an off screen transformation of when Prince Adam becomes He-Man for example we only see the flashes and we do not see He-Man hold the sword to his chest when he says “I have the power!”

Continuity

 * Professor Smallen returns, albeit with a slightly altered color scheme in The Great Books Mystery.
 * The animation of Man-At-Arms fixing one of the Zactons while the others look on would be reused, with a different background, in the moral segment for Teela's Trial.
 * The opening movement of He-Man attempting to strike Trap Jaw are based on animation seen in Ordeal in the Darklands.
 * The stormy background from this adventure will be seen again when Adam and Cringer approach Snake Mountin in their Wind Raider was first used in the episode Three on a Dare.

The He-Man and She-Ra Blog

 * A brief review #047 - "Keeper of the Ancient Ruins"
 * The best transformation (in my opinion)...
 * Smallen's expressions.
 * "Let's humor him!"
 * Reference to the past #2