As prophesied in the earlier preview for "Neil Patrick Harris' Puppet Dreams" web series, his Dr. Horrible co-star Nathan Fillion stopped by in a doctor's outfit in the newest episode to examine both NPH's puppet problem and his penis. And by penis we mean "the hammer." But of course by "the hammer" we still mean "penis."

Last night, Castle followed in the footsteps of CSI and many other shows and gave us a murder at a science fiction convention. But this Galaxy Quest-inspired outing was much more of a love letter to fans than a spoof on fandom — and it included the above scene, where Nathan Fillion's Castle gets in the Captain's…

Here it is, the very first clip from the Science Channel's Firefly 10-year anniversary special, Browncoats Unite. This new clip reveals that the special won't simply be footage taken from the tear-filled panel at San Diego Comic-Con.

Just a sweet little moment we had to share with you from the Firefly panel at New York Comic-Con. Jewel Staite and Sean Maher were together toasting to the 10-year reunion and talking old times in the big black. They were joined "by phone" by Nathan Fillion. But the joke was on Jewel; Fillion was there the whole time.…

The entire 10-year Firefly reunion at this years San Diego Comic-Con is now online, for your viewing pleasure. So grab a seat and pull up some tissues, because it is almost impossible to get through this whole thing without tearing up. Burn the land and boil the sea!

Can't make the epic 10-year Firefly reunion special at the San Diego Comic-Con this weekend? Have no fear, the whole thing is getting its very own TV special.

Joss Whedon, Tim Minear, Nathan Fillion, Alan Tudyk, Adam Baldwin, Sean Maher, Michael Fairman and the entire crew of the Serenity will take the stage for this year's Comic-Con to celebrate the 10th anniversary of Firefly. The event will take place on Friday (July 13th) at 12:30 PM in Ballroom 20. Commence freaking…

This week marked the long-awaited Firefly reunion between Adam Baldwin and Nathan Fillion. But what about the rest of the crew of the Serenity? Here are some suggestions for cameos that the rest of Firefly's MVPs could make on Nathan Fillion's frequently genre-tastic cop show.

It's a charm-off! Robert Downey Jr. stopped by Castle for a quick exchange of banter between the man himself, Nathan Fillion. Alas, the whole thing didn't go much further than, "I'm Iron Man, fuck off! That's a wrap everybody!"

On the episode "Punked" of the sleuthing show Castle, Nathan Fillion's mystery novelist Richard Castle investigated a steampunk society in New York City. At one point, our hero dons a retrotech arm built by crafter Thomas Willeford, who is now selling it on eBay. Explains Willeford of this piece: