Ghost Whisperer Season 5 Episode 22 (Ghost Whisperer s05e22) with title “The Children’s Parade” airs on Friday, May 21st 2010 at 08:00 pm via CBS.
Here is summary for Ghost Whisperer Season 5 Episode 22 :

Melinda’s investigation of a poltergeist in the hospital leads to a showdown with supernatural forces terrorizing her and her son, on GHOST WHISPERER, Friday, May 21 (8:00-9:00 PM, ET/PT) on the CBS Television Network.

Few hours after original series aired on TV, online streaming video for Ghost Whisperer Season 5 Episode 22 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.