Dooku, as a Jedi, was Yoda's apprentice alongside [[Bob (Jedi])]].

Soon, Dooku was seduced to the dark side of the Force, resulting in him fighting his master and fellow apprentice. During the battle, Bob (Jedi) was killed and Dooku escaped.

Years later, Dooku encountered Bob's sons, Ben and Yod, and his former master Yoda, himself. Ben and Yod were severely wounded by Dooku, but then Yoda attacked Dooku, striking his lightsaber on Dooku's cheek and then nearly cut off his leg.