Recap
Batman travels back to World War I in the Batplane to fight an alien dictator and his henchman. The alien has brought an advanced long-range energy cannon with him. As Batman prepares to attack, the German flying hero, Enemy Ace, opens fire on him, believing him to be the enemy. Batman manages to evade the pilot's machinegun fire until he can get close enough to explain that they have to team up. Realizing that the energy weapon is a dishonorable weapon, Enemy Ace opens fire and distracts the enemy long enough for Batman to destroy the cannon with a bomb. The alien flees in his spaceship and Batman returns to the present. As he goes, Enemy Ace says that it's been an honor knowing him... and it would be best if Batman did not meet him again, for Batman's sake...
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Episode Quotes
Batman: Stand down, Enemy Ace. Today we must fight a common foe: injustice.
Enemy Ace: We are even, Dark Knight of the skies. I hope we do not meet again in combat. For your sake.
Aquaman: Ahoy, evil-doer!
Fisherman: Aquaman, my old nemesis. I'll fillet you like a flounder!
Aquaman: A fitting end to... The Rescue of Rainbow Reef!
Mera: Just look at all the monuments to surface culture we can explore. The world's biggest ball of postage stamps.
Arthur Jr.: Boring.
Aquaman: Bigger than the Great Barrier Reef? I doubt it.
Mera: The Museum of Cheese.
Arthur Jr.: Lame.
Aquaman: Hah! I eat cheese for breakfast.
Mera: Not. Helping.
Aquaman: Wait. You're fighting henchmen!
Green Arrow: Time's up, Clock King. You're going back to counting the hours in your prison cell.
Clock King: Hah! This is your death knell, Green Arrow.
Aquaman: Time's up, Clock King.
Green Arrow: I already said that.
Planet Master: Feel the strength of Jupiter. The speed of Mercury. The cold of Pluto.
Blue Beetle: Newsflash. Pluto isn't considered a planet any more.
Planet Master: Insolence!
Planet Master: Fools. Witness the power of the rings of Saturn!
Blue Beetle: You really don't want to see the power of Uranus.
Blue Beetle: Well done, you chum. Be sure to drop by the next time you're in Atlantis.
Blue Beetle: Really? Awesome!
Aquaman: That about wraps it up for...
Blue Beetle: Ooh, wait! Uh, heh, heh. Do you think maybe I could title the adventure?
Aquaman: Of course, my young friend.
Blue Beetle: I've got it. "The Attack of..."
Aquaman: That's right! "The Plague of the Planet Master!"
Aquaman: Just think of the heroics that went into packing that much sod.
Mera: Why are we going to Gotham?
Aquaman: Because, my precious coral, Gotham City is one of the continent's oldest and most historic surface settlements. It's a center of world art, culture, and commerce. (gunshots in the distance) Windows up!
Mera: You're here to see Batman, aren't you?
Aquaman: What? Is this where Batman lives? I had no idea.
Batman: You're about to get your beak clipped, Penguin!
Batman: There's been a change in the forecast, Penguin. A 100% chance of hard time at Blackgate Prison.
Arthur Jr.: I want to see you save the world again. We'll call it, "The Time My Dad Saved the World Again!"