Star Wars Trilogy - Star Wars V: The Empire Strikes Back

Three years later, imperial forces continue to pursue the Rebels. After the Rebellion's defeat on the ice planet Hoth, Luke journeys to the planet Dagobah to train with Jedi Master Yoda, who has lived in hiding since the fall of the Republic. In an attempt to convert Luke to the Dark Side, Darth Vader lures young Skywalker into a trap in the Cloud City of Bespin. In the midst of a fierce lightsaber duel with the Sith Lord, Luke faces the startling revelation that the evil Vader is in fact his father, Anakin Skywalker.