The Non-Canon Expert looks at Darth Vader’s early fear about being the next Dooku for his Master Darth Sidious, where he worried that he would eventually be sacrificed by Sidious when he found another apprentice who was more powerful than him. He then describes how Sidious became infuriated with Vader when he was confronted with the fate of his former apprentice Dooku. This is a Legends story for Darth Vader and Darth Sidious with information found primarily within the Legends novel «Star Wars: Dark Lord: The Rise of Darth Vader» by James Luceno.