There are several reasons to love Castle.

You get the detective business, but it’s lighthearted. There are jokes and romances that other cop shows lack. In reality, Castle is one of a kind. And "The Final Frontier” was another hour of television that proved why. No other series could have pulled this off.

Supernova Con. The weekly case took place at a sci-fi/comic book convention. A woman is murdered after working to bring back a canceled show by providing fan experiences. Not only did the case bring about some funny characters, but it was the ultimate nod to Firefly. 

Spacecraft crew fighting to survive? Check. Canceled after one season? Check. Mention of Joss Whedon? Check.

This was pretty much awesome. What made it even better was Beckett’s long standing obsession with the show. Did you see the picture of her dressed up as Lt. Chloe? Hot. Speaking of hot: Hello, Alexis!

Gabriel Winters: You Are The Man. We must give a shout out to Ed Quinn, who rocked as a Nebula 9 character. He was hilarious and provided one solid one-liner after another. (Check them out in our Castle Quotes section.)

Caskett Carries On. These two characters have developed such a fun relationship. Work and play has to be the best combination. It feels natural and is seriously enjoyable to watch. Was anyone else surprised at the fact that no one mentioned their relationship, considering they just found out? A little odd.

Beckett’s request to watch a Nebula 9 marathon with Castle in exchange for dressing up in her costume was great. How could you not adore this character even more after she showed those amazing legs up to her mask? 

Andrew Marlowe, week after week you continue to make this show so much fun.

Overall, a pretty fun episode - especially if you are a fanboy/girl, costume wearing comic book geek like most of us. Check back later this week for the Castle Round Table and don’t forget to hit up the comments to let us know what you thought of “The Final Frontier.”

Until next time Castle fans, remember: May fortune guide your journey.