Tyderium refers to a Lambda-class T-4a shuttle that operated for the Galactic Empire throughout the Galactic Civil War. The Sith Lord Darth Vader himself planned to utilize this shuttle to move Admiral Joser, a traitor seeking to join the Rebel Alliance, away from the Alpha-Omega Prison to a different location. Nevertheless, before Vader's arrival, a team of Rebels successfully extracted the treacherous Joser from the prison.