Fans of Joss Whedon already know all about Nathan Fillion. Whether as the charismatic leader Captain Mal Reynolds on Firefly, the charismatically evil Caleb on Buffy the Vampire Slayer or the charismatic but arrogant Captain Hammer in Dr. Horrible’s Sing-a-Long Blog, there’s one thing that ties every Nathan Fillion performance together.

That charisma is put to great use in Fillion’s new ABC series Castle, premiering Monday night at 10pm following Dancing with the Stars. Fillion is the kind of guy who inspires legions of fans to swoon with a simple smirk, and in Castle, his smirking is on full display for the masses…

…The main reason to watch is Nathan Fillion. He was wasted last season on Desperate Housewives and never got a chance to shine on FOX’s very short-lived Drive. But now, on a big network airing after a huge hit, a show with Nathan Fillion in the lead is in a perfect position to survive, and hopefully America will embrace him as much as Whedon fans have from the first time they saw him.

I defy you not to be won over by him. I dare you to watch Castle and not become an instant worshiper at the church of Nathan Fillion. There’s a reason people still congregate to honor a show that only lasted for nine episodes on Friday nights on FOX, and while Joss Whedon may be part of it, it’s Fillion who stole our hearts.

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