Duck Dodgers accidentally explodes the ship's energy core, sending the crew adrift. To convince a Martian ship to rescue them, Dodgers dresses Cadet as a space vixen. / Duck Dodgers must escort a beautiful secret agent to a Martian-controlled planet. To prove his love for the lady spy, Dodgers volunteers to destroy an enemy radio tower.

Daffy receives a robot crewmember, Roboto, but becomes jealous of the robot's perfect skills. When an asteroid threatens the crew, Roboto sacrifices himself to save his new friends. / Daffy and Marvin compete in an interstellar race. Daffy begins by cheating, but learns that victory may come easier with persistence.

Duck Dodgers and Cadet are put on trial for destroying Earth's defensive shield. When Dodgers proves that he also destroyed the advancing Martian ship with a potato gun, the court finds him not guilty. / Duck Dodgers responds to a planet's distress signal and mistakes its gelatinous inhabitants for the enemy invaders. When Dodgers meets the real invaders--beautiful space vixens--he becomes enamored and fails to see their danger. But when the sun goes down, the vixens transform into giant caterpillars, giving Cadet his chance to save the day.

Duck Dodgers and Cadet come into contact with a flower that induces rapid aging. To obtain the cure, they must head to an enemy planet, where they discover that the flower reverses aging on Martians. Marvin becomes a baby and engages the elderly duo in a battle for the fountain of youth. / Duck Dodgers and Cadet must retrieve a baby philosopher to save a peace conference. When Martians kidnap the baby, Cadet gives chase while Dodgers disguises himself as the baby to prevent war.

A fat-sucking space vampire hypnotizes Duck Dodgers into detaining Cadet for a pork dinner. But having discovered the vampire's one weakness, health food, Cadet makes a decoy of himself from tofu. / Drake Darkstar, an evil Duck Dodgers doppelganger, steals Dodgers' identity to escape incarceration. When Dodgers escapes from prison and arrives on his own spaceship, he must prove to Cadet that he is the real Duck Dodgers.

A rebel army of gophers vows to overtake Mars. Marvin's canine companion discovers the plan during a golf game but can't communicate the information to his master. Without Marvin's help, it's up to K-9 to save the planet on his own. / Duck Dodgers and Cadet investigate space barbarians planning to invade Earth. While on the rogue planet, Cadet discovers a shiny rock that transforms him into a gargantuan warrior. Cadet defeats the barbarians and becomes their king but can't sustain his new physique forever.