Gravity Season 1 Episode 5 (Gravity s01e05) with title “Love At First Suicide” airs on Friday, May 21st 2010 at 10:30 pm via Starz.
Here is summary for Gravity Season 1 Episode 5 :

As Robert comes to terms with the loss of his wife, he opens his heart to Lily. Meanwhile, Adam and Shawna engage in a flirtation despite the difference in age.

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