A mysterious MacGyver-type brainiac named Mallory Mastermind escapes from a high security underground prison with the help of a simple ballpoint pen that she turns into her own robot helper.
Four villains who have battled the Loonatics in the past miraculously escape during a prison transfer right under Duck's nose. They're transferred to a planetoid in space where they meet their liberator Optimatus.
In Part Two, Zadavia tells Ace and the team that she and her brother Optimatus are from another world and have different ideas about ruling it. She was banished by her brother and found a new home in Acmetropolis.
There's a runaway train from the future supposedly holding a valuable treasure, and it's up to the Loonatics to stop it. When Ophiuchus Sam shows up to rob the train, a mysterious stranger named Deuce appears.
A group of crazed, mutant dolphins led by the deranged Adolpho are using mind-control to sink all of Acmetropolis. It's up to Duck and his newfound "Aqua Dense" power to stop them.
Sweet-talking Pierre Le Pew lures Slam into an illegal wrestling ring (with Duck as his manager) where he has to fight the energy-eating Gorlap from Gossamer.
The Loonatics are given the mission to deliver Prince Tweetums to his planet, Blanc, where he is heir to the throne. It's vital that he reaches the planet to prevent a 1500-year war.
Rev gets a visit from his family (mother, father and brother Rip), and when his latest invention impresses his father, it just enfuriates his jealous younger brother, Rip, even more.
When Duck takes all the credit for catching the Shropshire Slasher, Tech gets annoyed. But when Duck starts to suspect that the Slasher is out for revenge, he's more than willing to let Tech take the glory.