The Boondocks Season 3 Episode 5 (The Boondocks s03e05) with title “Stinkmeaner 3: The Hateocracy” airs on Sunday, May 30th 2010 at 11:30 pm via Adult Swim.
Here is summary for The Boondocks Season 3 Episode 5 :

The Freemans are in trouble when Stinkmeaner’s gang decide to come after them in retaliation for his death.

Few hours after original series aired on TV, online streaming video for The Boondocks Season 3 Episode 5 usually available on Net and of course, if video available, as soon as possible will show you where you can watch this episode for free.