Saving Grace Season 3 Episode 19 (Saving Grace s03e19) with title “I’m Gonna Need a Big Night Light” airs on Monday, June 21st 2010 at 10:00 pm via TNT Network.
Here is summary for Saving Grace Season 3 Episode 19 :

In the series finale, Grace undergoes a grand spiritual metamorphosis and journeys back to Oklahoma City. With sheer determination and a newfound sense of purpose, she sets out to vanquish evil.

Few hours after original series aired on TV, online streaming video for Saving Grace Season 3 Episode 19 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.