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Seamus Dever
ACTOR

Seamus Dever

Known for The Rookie · Charmed · NCIS

Seamus Dever (born July 27th, 1976) is an American actor, best known for playing Detective Kevin Ryan in the television series Castle (2009).

Snapshot 2026-10-15

Born
Jul 27, 1976
Birthplace
Flint, Michigan, USA
Known For
Acting

Biography

Seamus Dever (born July 27th, 1976) is an American actor, best known for playing Detective Kevin Ryan in the television series Castle (2009).

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Known For

TVThe Rookie
The RookieChaz Bachman · 2018
★ 8.5
TVCharmed
CharmedMitchell Haines · 1998
★ 8.2
TVNCIS
NCISGraham Thomas · 2003
★ 7.6
TVCastle
CastleKevin Ryan · 2009
★ 8.0
TVGhost Whisperer
Ghost WhispererRich Henderson · 2005
★ 8.1
TVCSI: Miami
CSI: MiamiPaul Billings · 2002
★ 7.7
TVMad Men
Mad MenChuck · 2007
★ 8.1
TVCSI: Crime Scene Investigation
CSI: Crime Scene InvestigationAdam Gilford · 2000
★ 7.6

Filmography

Movies

SL
Shooting LAColin
2001
Monkey LoveAaron Miles
2002
Outside the LawRick Michell
2002
She's No AngelCricket
2002
Nikki and NoraOfficer Paul Cordone
2004
McBride: The Doctor is Out...Really OutAllen
2005
Mystery Woman: SnapshotBilly
2005
HollywoodlandPhillip
2006
Ready or NotMarc
2009
MindgameRay
2017
MindgameExecutive Producer
2017
AwakenHenry Viser
2020
A Great DivideRanger Tom Drake
2023
Invitation to a MurderLawrence Kane
2023
The BlackDr. Simon Carver

Television

JAGCaden Duran · 1 eps
1995
Pensacola: Wings of GoldLewis · 1 eps
1997
CharmedMitchell Haines · 1 eps
1998
UndressedRandy · 3 eps
1999
CSI: Crime Scene InvestigationAdam Gilford · 1 eps
2000
CSI: Crime Scene InvestigationDrew Rich · 1 eps
2000
Crossing JordanTom Murch · 1 eps
2001
CSI: MiamiPaul Billings · 1 eps
2002
Without a TraceRonald Phelps · 1 eps
2002
Cold CaseHank Dempsey · 1 eps
2003
NCISGraham Thomas · 1 eps
2003
NCISGabriel LaRoche · 6 eps
2003
CSI: NYCharles Cooper · 1 eps
2004
Close to HomeJustin Matthews · 1 eps
2005
Ghost WhispererRich Henderson · 1 eps
2005
ThresholdAgent Detoro · 2 eps
2005
Army WivesDr. Chris Ferlinghetti · 7 eps
2007
Mad MenChuck · 1 eps
2007
CastleKevin Ryan · 173 eps
2009
Dark BlueNick Perry · 2 eps
2009
Drop Dead DivaTyler Mack · 1 eps
2009
NCIS: Los AngelesAlexi Goncharov · 3 eps
2009
MacGyverGriggs · 1 eps
2016
LegionDon Eichman · 1 eps
2017
Take TwoTodd Garlin · 1 eps
2018
The RookieChaz Bachman · 1 eps
2018
TitansTrigon · 2 eps
2018
TitansTrigon / Captain Frank Finney · 1 eps
2018
HuntersTomasz Arndt · 1 eps
2020
Kung FuMax DeVeer · 1 eps
2021
NCIS: HawaiʻiScott · 1 eps
2021
True LiesReed · 1 eps
2023
Waco: The AftermathAndy the German · 5 eps
2023
TrackerMax Miller · 1 eps
2024
BS
Bosch: Start of WatchOfficer Hastings · 1 eps

Photos

Seamus Dever photo
Seamus Dever photo
Seamus Dever photo
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