Trivial Sci-Fi TV Post

I love the Star Trek Fan Collective compilation DVD sets of episodes from the various series centered on given themes. I own the Borg one, and I've just bought the time travel one. I'd like the one on Klingons, but I'm less interested in the fan collective about Q and the "captain's log" one.

Also, I feel like I have a gaping hole in my life that only the fourth season of The 4400 can fill. WHEN is that coming out on DVD?