Season 4, Episode 10 - "Goodbye and Good Riddance [HD FLASH]"
![Watch Ben 10 Season 4, Episode 10 - Goodbye and Good Riddance [HD FLASH]](/_episodeimage/944.4.10.jpg)
26 March, 1988
Ben, Gwen, Cooper and Grandpa Max face their last battle ever against the villains they have encountered and they will battle to get the world's most powerful energy source.
