After dying in Spring 2006 (minor details), Denny has been back for a couple of weeks now, but only this time has he started interacting with anyone but Izzie.

Well, only she can see him, but still. Fool is standing up for his girl! Here's a clip from the December 4 episode, "All By Myself," of Denny talking smack to Alex ...

[video url="/videos/greys-anatomy-preview-all-by-myself/" title="Grey's Anatomy Preview: All By Myself"] [/video]

ABC will be re-airing the Season 5 premiere of Grey's Anatomy, "Dream a Little Dream of Me," on Thanksgiving, with this new episode to follow next Thursday.

Follow the link for more videos and Grey's Anatomy spoilers!

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.