User blog comment:Superguy79/"Invasion" premiere date/@comment-89.229.124.83-20120318060049/@comment-1038387-20120318224056

It would seem totally pointless to waste half an episode, or a full one potentially, on something that's been dealt with already, especially since we're so close to the finale. Even if it's a filler, it's got to have some connection to the Light.