
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.

Law & Order
TV • 1990

Law & Order
TV • 1990

Law & Order: Special Victims Unit
TV • 1999

The Blacklist
TV • 2013

Law & Order: Criminal Intent
TV • 2001

Elementary
TV • 2012

Person of Interest
TV • 2011

Blue Bloods
TV • 2010

Damages
TV • 2007

CSI: NY
TV • 2004

White Collar
TV • 2009

Unforgettable
TV • 2011

St. Elsewhere
TV • 1982

Billions
TV • 2016

The Facts of Life
TV • 1979

Oz
TV • 1997

Amazing Stories
TV • 1985

Back to the Future
MOVIE • 1985