Nathan Fillion - Castle 1-06

Nathan Fillion shirtless in Castle 8-09 "Tone Death"

Nathan Fillion shirtless in Castle 8-07 "The Last Seduction"

Kamar de los Reyes shirtless in Castle 7-12 "Private Eye Caramba!"

Derek Krantz and Brett Weinstock shirtless in Castle 7-05 "Meme Is Murder"

Myko Olivier shirtless in Castle 6-04 "Number One Fan"

Nathan Fillion shirtless in Castle 5-22 "Still"

Brent Witt shirtless in Castle 5-19 "The Lives Of Others"

Jason Mac shirtless in Castle 5-19 "The Lives Of Others"

Skyler Stone shirtless in Castle 5-15 "Target"

Nathan Fillion shirtless in Castle 5-04 "Murder He Wrote"

Nathan Fillion shirtless in Castle 5-01 "After The Storm"

Brett Tucker shirtless in Castle 4-20 "The Limey"

Roy Huang shirtless in Castle 3-21 "The Dead Pool"

Justin Bruening shirtless in Castle 3-21 "The Dead Pool"

Jon Huertas shirtless in Castle 3-12 "Poof, You're Dead"

Corey Saunders and Clint Hummel shirtless in Castle 3-07 "Almost Famous"

Nathan Fillion shirtless in Castle 2-20 "The Late Shaft"

Tyler Hoechlin in Castle 2-04 "Fool Me Once..."

Paul Diaz shirtless in Castle 2-03 "Inventing The Girl"