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Wonder Woman's depiction of the Cowardly Lion is patterned after the famous portrayer from the 1939 musical film of "Oz", Bert Lahr.
The episode title refers to "The Land of Oz" which was created by Lyman Frank Baum in 1900.
When Wonder Woman is the Cowardly Lion, she does not get her red boots back until she, Aquaman and Superman reach the Wizard.
Superman is able to outsmart Mxyzptlk by using his heat vision to change his lead suit back into tin, thereby rendering his formula useless. But how can he change one metal into another? Not until Firestorm comes later in another SuperFriends incarnation would any of them have the capability of doing this.
Both Aquaman and Superman's depictions of the Scarecrow and Tin Man were patterned after the two famous portrayers from the 1939 musical film of "Oz", Ray Bolger and Jack Haley.
When the remaining strength of the SuperFriends is transferred to Robin, the Boy Wonder flexes his biceps and says, "I feel as strong as Superman!" How could little Dick Grayson possibly know how it feels to be as strong as Superman?
A little bit of Wonder Twins water shorts out Android Batman, but water didn't seem to bother him when the jet he was flying submerged in the ocean with the co-pilot's window blown off.
When Android Batman relays his instructions to Captain Nemoy, his chest insignia is reversed; that is, a gold bat in a black oval instead of the standard black bat in a golden oval seen when he was first activated.
Goof: When Superman uses his combined x-ray vision and chill breath to free himself from the Kryptonite manacles, the blue sleeves of his costume disappear.
Goof: When evil Superman begins to fly back to the Hall of Justice after causing Mount Vesuvius to erupt, the background shows a night sky instead of day.
In the scene where the Super Enemies complete their examination of Superman, two goofs occur. First, at the beginning of the scene, it's a day sky over the Hall of Evil instead of the night sky when they arrived earlier. And when the Trouble Alert signal sounds, evil Aquaman speaks with evil Batman's voice when he says, "It's the Trouble Alert!" This is similar to the above-mentioned goof where good Aquaman speaks with good Batman's voice.
While panning the night sky in the evil universe, we see a nice shot of Earth. How can people on Earth look up to the night sky and see...Earth? It's assumed this is supposed to be the moon, but perhaps there is something really funky going on in the evil universe.
After the evil Superman talks to Zan and Jana in the Hall of Justice, he says he has things to do and flies away. But he's still inside when he does so. Is there a hole in the roof for this kind of thing?
We do see an evil Gleek, but there's no evil Zan and Jayna.
After Wonder Woman and Aquaman rescue Batman and Robin from the armored van the evil Superman trapped them in, Aquaman says, "We've got to try and stop him. Come on!" But it's Olan Soule as Batman saying the lines, not William Callaway as Aquaman.
When the good Superman is given the flask, it's in a traditional lab-triangle shape. But when he opens it, it has mysteriously changed to a cylinder shape.
When Gleek leads the SuperFriends to the small cave the Wonder Twins went into, it looks like Batman says, "Well, let's take a look." The voice heard, though, is Danny Dark (Superman).
Goof: We see the other Superfriends gather around Superman (Batman included) then the next second you see Batman ride up on his horse.
Batman expressed some concern that the explosive impact from the laser lances in his joust with Superman might finish him, yet he comes out pretty well unscathed even though Superman is much stronger and the explosion actually did restore his memory. I know Batman's a great superhero, but he is human and should have been more seriously injured. And what about their horses? If anything, their being closest to the explosion should have resulted in their certain deaths.
After Superman's memory is restored, he's on the ground in his Black Knight armor, asking Batman questions. We then see Batman respond. Then we're back to Superman again, who hasn't moved a muscle, but his armor is gone and he's back in is Supersuit.
At the end of the last scene after the Wonder Twins return from Exxor, Aquaman's right glove is missing.