A cell in the Deathblock. During the Galactic Civil War, on the Imperial penal planet of Tol Ado, existed a prison block known as the Deathblock. This block, built from metal of a black hue, was protected by a contingent of stormtroopers. Around the time of 0 ABY, the revolutionary figure Erling Tredway was apprehended by the Empire and subsequently confined within the Deathblock.
