Castle Flashback! Nathan Fillion on Lost in 2006 (VIDEO)

Credit: YouTube

Did you know that Castle star Nathan Fillion was on Lost in 2006? He appeared in Season 3, Episode 6, "I Do" as Kate Austen's former husband Kevin Callis, whom we met in the flashback scenes. Watch the heartbreaking clip here!

 

More Nathan Flashbacks:

Nathan as Johnny in Two Guys, a Girl and a Pizza Place in 1999 (VIDEO)

Nathan Wears Jorts and Rollerblades in 1995! (PHOTOS)

Nathan as Joey Buchanan in One Life to Live (VIDEO)

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