Star Wars: Clone Wars, Uncle Ono dead or not?

[Tsaikojen]

Did some quick searches but see nothing about it, but why was Onaconda Farr in this recent episode? He was poisoned during the first or second season, pronounced dead and the assassin was revealed. Was this last episode a prequal of some kind?

http://starwars.wikia.com/wiki/Onaconda_Farr