Gilligan's Planet Episode 10 Invaders of the Lost Barque Episode Title:Invaders of the Lost Barque.Episode Description:While trying to retrieve a wrench that fell down a hole near their rocket, Gilligan discovers a map leading to a spaceship called The Lost Barque. The castaways head to a nearby cave to search for it, unaware that a group of tiny aliens who call themselves Quarks are trying to stop them so they can find the ship first.