Goof: When the gang is in the ship's radio room, the pinstripes of Alexander's pants are briefly missing.
Goof: How does Melody have glasses after she's turned old?
Goof: After Alexander had gotten the antidote for the old age mist, he used it to restore Melody, Alexandra, and himself. But Sebastian was restored even though Alex wasn't seen using it on him before the ensuing chase scene.
Goof: Alexander's orange shirt collar is colored green at least 3 times in this episode. First, when the gang is brought before Zor, then twice when they're looking up at the spaceship in the sky.
Goof: When the gang get sucked into the giant vacuum, the color of Alan and Alexander's hair switches to each other's and back.
Goof: When Alex, Valerie, and Melody return to the alien hideout to rescue the others, they ditch their native disguises. Notice their arms and it seems Melody's sleeve is blue when they drop their attire.
Goof: Alexander's hat goes missing and reappears a couple of times during the chase scene
Goof: The group's music instruments and luggage are on top of the van. But in the overhead shots during the chase scene, they're missing and are gone after they left in a taxicab with no indication they took it with them considering they needed to get away quickly.
Goof: When Valerie is packing a bathtub into one of the crates, her left hand is a pale complexion.
Goof: When the Laser turns on his viewscreen to observe the gang training his men, the first image seen is Josie with Alexander when the latter says "OK class, observe carefully" as he's holding a pole with a plunger. However, he's speaking with Alan's voice just before the actual scene switches to Alan holding a lasso with Melody, Josie, and Alexander in the background.
Goof: When Josie notices the Laser's machine is doing everything the opposite way, Alexander's collar is colored green instead of orange.
Goof: When the Pussycats stand over the unconscious secret agent, Valerie's legs are pale-skinned.
Goof: When Josie points out the underground room the gang is trapped in is filling up with water, her lips move when she says "Oh, no", but stop moving as she finishes her sentence.
Goof: Just after Professor Leyton explains his predicament to the gang, the skirt portion of Josie's outfit is the same shade of light blue as the top portion.
Goof: When Alexander enters with the rest of the group in disguise as the Hawk's computer repairmen, his glasses have their regular green-colored rims. But when he's seen sabotaging some of the equipment, the rims are colored red.
Goof: Just after the gang enter the department store, Valerie is pale-skinned in the first shot.
Goof: When Alexander is pulling the rickshaw, Alexandra is seated on the left side and Valerie on the right. When the Serpent's toy plane pursues them and Alex eventually changes direction, Alexandra and Valerie's positions on the rickshaw have reversed as well as Alexandra is closer onscreen instead of Valerie, even though the shot had correctly changed Josie, Alan, and Melody's positions when Alexander ran the other way.
Goof: After he and Alan junk the Serpent's toy soldiers, the pinstripes on Alexander's pants are missing in the next shot.
Goof: When Josie puts on the toy soldier uniform, the sleeves are colored blue with red stripes. But afterward, when marching with Alan and Melody in disguise, the sleeves are red with blue stripes.
Goof: When Alan tries to stop the hot air balloon from taking off, the closeup shot of his foot shows his sock colored gray. But in the next shot when Alexander tries to help him, the sock is colored the same shade of blue as his shirt.