Yepeee you can Watch Supernatural Season 5 Episode 22 right now, this series is entitled "Swan Song", I think the episode was been the latest viewed right now. Here is the episode synopsis below before you browse the video link:
The showdown between good and evil is at hand. With the Apocalypse looming, Sam and Dean realize they are out of options and make heart-breaking decisions that will change their lives forever. A beloved character faces death.
Link Video: tinyurl.com/Supernatural-Se5