Dever, Seamus 

Seamus Dever has also commented in character as Kevin Ryan.

 

Listing 6 commentaries.

Castle: The Complete First Season cover

Castle: The Complete First Season
1 of 4 commentaries
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Episode 1.10: “A Death in the Family (Commentary 2)”
Commentators: Seamus Dever Jon Huertas

Castle: The Complete Third Season cover

Castle: The Complete Third Season
1 of 2 commentaries
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Episode 3.06: “3XK”
Commentators: Bill Roe David Amann Seamus Dever Jon Huertas

Castle: The Complete Fourth Season cover

Castle: The Complete Fourth Season
1 of 3 commentaries
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Episode 4.01: “Rise”
Commentators: Rob Bowman Jon Huertas Seamus Dever Tamala Jones

Castle: Season 6 cover

Castle: Season 6
1 of 4 commentaries
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Episode 6.10: “The Good, The Bad & The Baby”
Commentators: John Terlesky Terri Miller Nathan Fillion Seamus Dever

Castle: Season 7 cover

Castle: Season 7
1 of 2 commentaries
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Episode 7.01: “Driven”
Commentators: Rob Bowman Jon Huertas Seamus Dever David Amann

Castle: Season 8  cover

Castle: Season 8
1 of 2 commentaries
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Episode 8.16: “Heartbreaker”
Commentators: Jon Huertas Seamus Dever Barry O'Brien