Expanded Universe, Dark Empire - Imperial Sentinel with 3-D Play Scene. Six years after the destruction of the second Death Star, the galaxy is thrust into turmoil. A reborn evil threatens to enslave the galaxy, and the Republic's closest friend - Luke Skywalker - may become their greatest enemy. At the doors of the evil Emperor's palace, giant Imperial Sentinels, twice the size and power of other Imperial guards, await their prisoner - the Jedi Master, Luke Skywalker.