![Nathan Fillion wears his Firefly outfit on Castle. :) | Comic book guy, Nathan fillion, Firefly serenity Nathan Fillion wears his Firefly outfit on Castle. :) | Comic book guy, Nathan fillion, Firefly serenity](https://i.pinimg.com/originals/c6/a5/a4/c6a5a477004bc3717ead5bf5d765176c.jpg)
Nathan Fillion wears his Firefly outfit on Castle. :) | Comic book guy, Nathan fillion, Firefly serenity
![Nathan Fillion wears his Firefly outfit on Castle. :) | Comic book guy, Nathan fillion, Firefly serenity Nathan Fillion wears his Firefly outfit on Castle. :) | Comic book guy, Nathan fillion, Firefly serenity](https://i.pinimg.com/600x315/c6/a5/a4/c6a5a477004bc3717ead5bf5d765176c.jpg)
Nathan Fillion wears his Firefly outfit on Castle. :) | Comic book guy, Nathan fillion, Firefly serenity
![Castle' 100th Episode: Nathan Fillion Past Roles Paid Homage Throughout Series – The Hollywood Reporter Castle' 100th Episode: Nathan Fillion Past Roles Paid Homage Throughout Series – The Hollywood Reporter](https://www.hollywoodreporter.com/wp-content/uploads/2013/03/castle_firefly_to_buffy_a_l.jpg)
Castle' 100th Episode: Nathan Fillion Past Roles Paid Homage Throughout Series – The Hollywood Reporter
![Rick Castle dressed as Malcolm Reynolds. (Oh, I love the jokes they keep dropping into Castle about Firefly.) | Mal reynolds, Geek humor, Richard castle Rick Castle dressed as Malcolm Reynolds. (Oh, I love the jokes they keep dropping into Castle about Firefly.) | Mal reynolds, Geek humor, Richard castle](https://i.pinimg.com/736x/37/c9/91/37c991e6501d49f0bf12e37dd66fefe5--richard-castle-space-cowboys.jpg)