Family Guy Season 8 Episode 20 (Family Guy s08e20) with title “Something, Something, Something, Dark Side” airs on Sunday, May 23rd 2010 at 09:00 pm via FOX.
Here is summary for Family Guy Season 8 Episode 20 :

Peter makes good on another power outage at homeby entertaining his family with a retelling of Star Wars Episode V: The Empire Strikes Back.

Few hours after original series aired on TV, online streaming video for Family Guy Season 8 Episode 20 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.