Seamus Dever

Biography

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

Known For

Titans

as Trigon

Titans

as Trigon / Captain Frank Finney

Charmed

as Mitchell Haines

NCIS

as Graham Thomas

NCIS

as Inspector General Gabriel LaRoche

The Rookie

as Chaz Bachman

Castle

as Kevin Ryan

Ghost Whisperer

as Rich Henderson

CSI: Miami

as Paul Billings

Legion

as Don Eichman