Casey Siemaszko

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 Back to the Future, Young Guns, Silence of the Heart, Of Mice and Men, Killing Kennedy, Back to the Future Part II and Stand By Me.

Known For

Law & Order: Special Victims Unit

The Blacklist

Law & Order

Law & Order

Blue Bloods

Person of Interest

Law & Order: Criminal Intent

Elementary

All Movies (38)

• Killing Kennedy2013 · as Jack Ruby
• Public Enemies2009 · as Harry Berman
• The Boy Who Cried Bitch: The Adolescent Years2007
• Grand Theft Auto: San Andreas - The Introduction2004 · as Johnny Sindacco (voice) (uncredited)
• The Street Lawyer2003 · as Rafter Mayes
• The Crew2000 · as Young Bobby Bartellemeo
• Limbo1999 · as Bobby Gastineau
• Chameleon II: Death Match1999 · as Jake Booker
• Together and Alone1998 · as Billy
• Rose Hill1997 · as Fergus Carroll
• Bliss1997 · as Tanner
• Mistrial1996 · as Detective Bobby Zito
• The Phantom1996 · as Morgan
• Black Scorpion1995 · as Dr. Goddard / The Breath Taker
• Napoleon1995 · as Conan (voice)
• Milk Money1994 · as Cash
• My Life's in Turnaround1994 · as Himself
• Teresa's Tattoo1994 · as Michael
• The Paint Job1993 · as Cal
• Of Mice and Men1992 · as Curley
• Near Mrs.1992 · as Colin Phipps
• The Big Slice1991 · as Mike Sawyer
• The Chase1991 · as Hutchinson
• Back to the Future Part II1989 · as 3-D
• Breaking In1989 · as Mike Lafebb
• Young Guns1988 · as Charley Bowdre
• Biloxi Blues1988 · as Don Carney
• Three O'Clock High1987 · as Jerry Mitchell
• Gardens of Stone1987 · as Wildman
• American Harvest1987 · as Dakota
• Stand by Me1986 · as Billy Tessio
• Amazing Stories1986 · as Jonathan
• Miracle of the Heart: A Boys Town Story1986 · as Andy Grainger
• Back to the Future1985 · as 3-D
• Secret Admirer1985 · as Roger Despard
• Silence of the Heart1984 · as Jeff
• Hard Knox1984 · as Aaron Davis
• Class1983 · as Doug

All TV Shows (25)

• Billions2016 · as Seids
• The Blacklist2013 · as Sam Raimo
• Elementary2012 · as Michael McGee
• NYC 222012 · as Blume
• Person of Interest2011 · as Lester Strickland
• Unforgettable2011 · as Lt. Greg Sartain
• Blue Bloods2010 · as Josh Thorp
• White Collar2009 · as Bertie Slavkin
• New Amsterdam2008 · as Peter Huygens
• Damages2007 · as Detective Dan Williams
• The Inside2005 · as Billy Ray Pope
• CSI: NY2004 · as Paul Sabotini
• Law & Order: Criminal Intent2001 · as Harvey Gruenwald
• Law & Order: Special Victims Unit1999 · as EPA Official
• Storm of the Century1999 · as Alton "Hatch" Hatcher
• Oz1997 · as Detective Tarnowski
• Chicago Sons1997
• 704 Hauser1994
• The Adventures of Brisco County, Jr.1993 · as Ned Zed
• Law & Order1990 · as Bart Rainey
• Law & Order1990 · as Defense Attorney Shuman
• Amazing Stories1985 · as Jonathan
• St. Elsewhere1982 · as Rick Messina
• The Facts of Life1979
• Hallmark Hall of Fame1951 · as Fergus