Law & Order Season 20 Episode 23 (Law & Order s20e23) with title “Rubber Room” airs on Monday, May 24th 2010 at via .NBC 10:00 pm
Here is summary for Law & Order Season 20 Episode 23 :

The series ends as Lupo and also Bernard try to locate a blogger who threatened to blow up a school, but the teachers’ union hampers the probe. Elsewhere, Van Buren’s personal issues become a public affair.

Few hours after original series aired on TV, online streaming video for Law & Order Season 20 Episode 23 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.