Justified Season 1 Episode 12 (Justified s01e12) with title “Fathers and Sons” airs on Tuesday, June 1st 2010 at 10:00 pm via FX.
Here is summary for Justified Season 1 Episode 12 :

In order to work for the Marshal’s Office, Raylan’s dad Arlo agrees to become a double agent and work for Bo Crowder. Elsewhere, Bo sets up a meth lab to get back in business.

Few hours after original series aired on TV, online streaming video for Justified Season 1 Episode 12 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.