Casey Siemaszko
Acting
63
Acting Credits
Biography
Casey Siemaszko (born Kazimierz A. Siemaszko) is a Polish-American actor and the brother of actress Nina Siemaszko. The son of a fighter in the Polish Underground who survived the Sachsenhausen concentration camp, Siemaszko narrated the 1998 feature, The Polish-Americans. Siemaszko was a graduate of the Goodman School of Drama at DePaul University in Chicago, which his sister, Nina Siemaszko later also attended. His acting career consists of smaller roles in dozen of popular films, including Ba...
Known For
Filmography
Billions
2016
as Seids
Killing Kennedy
2013
as Jack Ruby
The Blacklist
2013
as Sam Raimo
Elementary
2012
as Michael McGee
NYC 22
2012
as Blume
Person of Interest
2011
as Lester Strickland
Unforgettable
2011
as Lt. Greg Sartain
Blue Bloods
2010
as Josh Thorp
Public Enemies
2009
as Harry Berman
White Collar
2009
as Bertie Slavkin
New Amsterdam
2008
as Peter Huygens
The Boy Who Cried Bitch: The Adolescent Years
2007
Damages
2007
as Detective Dan Williams
The Inside
2005
as Billy Ray Pope
Grand Theft Auto: San Andreas - The Introduction
2004
as Johnny Sindacco (voice) (uncredited)
CSI: NY
2004
as Paul Sabotini
The Street Lawyer
2003
as Rafter Mayes
Law & Order: Criminal Intent
2001
as Harvey Gruenwald
The Crew
2000
as Young Bobby Bartellemeo
Chameleon II: Death Match
1999
as Jake Booker
Limbo
1999
as Bobby Gastineau
Storm of the Century
1999
as Alton "Hatch" Hatcher
Law & Order: Special Victims Unit
1999
as EPA Official
Together and Alone
1998
as Billy
Bliss
1997
as Tanner
Rose Hill
1997
as Fergus Carroll
Oz
1997
as Detective Tarnowski
Chicago Sons
1997
The Phantom
1996
as Morgan
Mistrial
1996
as Detective Bobby Zito
Black Scorpion
1995
as Dr. Goddard / The Breath Taker
Napoleon
1995
as Conan (voice)
My Life's in Turnaround
1994
as Himself
Teresa's Tattoo
1994
as Michael
Milk Money
1994
as Cash
704 Hauser
1994
The Paint Job
1993
as Cal
The Adventures of Brisco County, Jr.
1993
as Ned Zed
Of Mice and Men
1992
as Curley
Near Mrs.
1992
as Colin Phipps
The Chase
1991
as Hutchinson
The Big Slice
1991
as Mike Sawyer
Law & Order
1990
as Bart Rainey
Law & Order
1990
as Defense Attorney Shuman
Back to the Future Part II
1989
as 3-D
Breaking In
1989
as Mike Lafebb
Young Guns
1988
as Charley Bowdre
Biloxi Blues
1988
as Don Carney
Three O'Clock High
1987
as Jerry Mitchell
Gardens of Stone
1987
as Wildman
American Harvest
1987
as Dakota
Stand by Me
1986
as Billy Tessio
Miracle of the Heart: A Boys Town Story
1986
as Andy Grainger
Amazing Stories
1986
as Jonathan
Back to the Future
1985
as 3-D
Secret Admirer
1985
as Roger Despard
Amazing Stories
1985
as Jonathan
Silence of the Heart
1984
as Jeff
Hard Knox
1984
as Aaron Davis
Class
1983
as Doug
St. Elsewhere
1982
as Rick Messina
The Facts of Life
1979
Hallmark Hall of Fame
1951
as Fergus