Below is another promo for this week's all-new episode of Grey's Anatomy, "Invasion."

It's from Canada's CTV, and some clips shown in the half-minute preview are different than those played in the first ABC promo, so it's worth a look despite the mediocre quality.

Longer sneak peeks to come soon hopefully!

[video url="http://www.tvfanatic.com/videos/invasion-promo-ctv/" title="Invasion Promo (CTV)"] [/video]

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