Plot hole: For the past 5 series, Bulk and Skull have been in every episode. They've seen villains from other galaxies (Lord Zedd, Rita Repulsa, The Machine Empire, and Divatox) who have all sent monsters to Angel Grove and threatened Bulk and Skull on countless occasions. They've even been turned into monkeys and made invisible by space creatures. Why do they feel the need to spend Series 6 seeing if alien life exists? Surely 5 series worth of aliens is enough proof?
Continuity mistake: Throughout the series, the Rangers' morphing has been instantaneous. Anyone who has ever been in a photobooth will know that they take a good minute or so to get through all 4 photos (which is what Sophie picks up) - it has never taken Carlos, or any Ranger, that long to morph.
Plot hole: Andros leaves the Shuttle on the remote planet, then later returns. Not long after the Astro Megaship lands, it is attacked - the Rangers quickly retreat and take off. The Rangers could not have formed the Astro Megazord later on in the episode, as they left the Space Shuttle on the remote planet (the Shuttle serves as the head of the Astro Megazord).
Continuity mistake: Bulk throws a watermelon in the air. When it lands on his head, its texture changes from darker to lighter, and the "watermelon lines" aren't as visible - this couldn't have been caused by the watermelon splitting, as half of it stayed on Bulk's head.
Factual error: Bulk, Skull, and the Professor try to get in a Apollo Saturn V rocket to escape Earth. They head up the tower, and are seen getting into the ship via the thin pillar at the top - this pillar was used in case there was an emergency early on in the launch. Astronauts got into the ship in the Command Module, which was slightly lower down.
Continuity mistake: Piranatrons have always been small and weak - their appearance hadn't changed for 2 series and a film. Yet when Quadtrons and Piranatrons are fighting the Phantom Ranger, the Piranatrons are noticeably taller and larger than normal, when standing behind Divatox. Divatox has ALWAYS been bigger and taller than Piranatrons.
Continuity mistake: The entire episode, the Astro Megaship is shown orbiting the Earth, yet a few minutes after the Craterites appear, they are parachuting out of the Astro Megaships. Not only were they not shown to have grabbed parachutes when jumping out, but the Megaship wasn't even in the Earth's atmosphere.