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.
Back to the Future
As 3-D
Back to the Future Part II
As 3-D
Stand by Me
As Billy Tessio
Class
As Doug
Secret Admirer
As Roger Despard
Young Guns
As Charley Bowdre
Black Scorpion
As Dr. Goddard / The Breath Taker
Of Mice and Men
As Curley
The Phantom
As Morgan
Three O'Clock High
As Jerry Mitchell
Gardens of Stone
As Wildman
Biloxi Blues
As Don Carney
Breaking In
As Mike Lafebb
The Crew
As Young Bobby Bartellemeo
My Life's in Turnaround
As Himself
The Street Lawyer
As Rafter Mayes
Teresa's Tattoo
As Michael
The Paint Job
As Cal
Miracle of the Heart: A Boys Town Story
As Andy Grainger
The Chase
As Hutchinson
Killing Kennedy
As Jack Ruby
Grand Theft Auto: San Andreas - The Introduction
As Johnny Sindacco (voice) (uncredited)
Silence of the Heart
As Jeff
The Big Slice
As Mike Sawyer
Milk Money
As Cash
Mistrial
As Detective Bobby Zito
Chameleon II: Death Match
As Jake Booker
Bliss
As Tanner
Rose Hill
As Fergus Carroll
Public Enemies
As Harry Berman
Amazing Stories: The Movie I
As Jonathan (archive footage)
Hard Knox
As Aaron Davis
Near Mrs.
As Colin Phipps
American Harvest
As Dakota
Together and Alone
As Billy
Amazing Stories
As Jonathan
The Boy Who Cried Bitch: The Adolescent Years
Limbo
As Bobby Gastineau
Napoleon
As Conan (voice)
St. Elsewhere
New Amsterdam
As Peter Huygens
The Facts of Life
CSI: NY
As Paul Sabotini
Oz
As Detective Tarnowski
The Inside
As Billy Ray Pope
704 Hauser
Damages
As Detective Dan Williams
Hallmark Hall of Fame
As Fergus
Storm of the Century
As Alton "Hatch" Hatcher
Law & Order: Criminal Intent
As Harvey Gruenwald
Elementary
As Michael McGee
Person of Interest
As Lester Strickland
The Blacklist
As Sam Raimo
Blue Bloods
As Josh Thorp
White Collar
As Bertie Slavkin
Amazing Stories
As Jonathan
Law & Order
As Bart Rainey
Billions
Unforgettable
As Greg Sartain
The Adventures of Brisco County, Jr.
As Ned Zed
Law & Order: Special Victims Unit
As EPA Official
Chicago Sons
NYC 22
As Blume