Season 1, Episode 8 : Sandy's Rocket

Sandy and SpongeBob are going to the moon, but at night SpongeBob and Patrick sneak into the rocket to "alien-proof" it. While doing so, they accidentally start up the rocket, but they crash-land back in Bikini Bottom. Thinking they're on the moon, they capture all the "aliens" (actually the inhabitants of Bikini Bottom) until Sandy comes and sets them straight.

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