| Casey Siemaszko | |
| Birth Name: | Kazimierz Andrew Siemaszko[1] |
| Birth Date: | March 17, 1961 |
| Birth Place: | Chicago, Illinois, U.S. |
| Occupation: | Actor |
| Relatives: | Nina Siemaszko (sister) |
| Years Active: | 1983–present |
Kazimierz Andrew "Casey" Siemaszko (; born March 17, 1961) is an American actor. He had supporting roles in Back to the Future and Stand By Me before having starring roles in Three O'Clock High and Young Guns.
Siemaszko was born in Chicago and grew up on the city's northwest side.[2] He attended Saint Ignatius College Preparatory School and graduated from the Goodman School of Drama at DePaul University in 1983.[3] [4] His father, Konstanty (1918–1999), was a Polish Roman Catholic and a former member of the Polish Navy. He joined the Polish Underground and was a survivor of the Sachsenhausen concentration camp. He emigrated to Chicago in 1959 and became a well-known local choreographer and a fixture in the Polish community. His mother, Collette McAllister (1931–2008), was English.[5] His sister Nina is an actress and his brother, Corky, is a writer for Daily News and a reporter for NBC News.
| Year | Title | Role | Notes | |
|---|---|---|---|---|
| 1983 | Class | Doug | ||
| 1985 | Secret Admirer | Roger Despard | ||
| Back to the Future | "3-D" | [6] | ||
| 1986 | Stand by Me | Billy Tessio | ||
| 1987 | Gardens of Stone | Wildman | ||
| Three O'Clock High | Jerry Mitchell | |||
| 1988 | Biloxi Blues | Private Donald J. Carney | ||
| Young Guns | Charlie Bowdre | |||
| 1989 | Breaking In | Mike Lafebb | [7] [8] | |
| Back to the Future Part II | "3-D" | [9] | ||
| 1992 | Of Mice and Men | "Curley" | ||
| 1994 | Teresa's Tattoo | Michael | ||
| Milk Money | "Cash" | |||
| 1995 | Napoleon | Conan / Pengi | Voice | |
| Black Scorpion | Dr. Goddard | |||
| 1996 | The Phantom | Morgan | ||
| 1997 | Bliss | Tanner | ||
| 1998 | Taxman | Abrasha Topolev | ||
| 1999 | Limbo | Bobby Gastineau | ||
| 2005 | The Crew | Young Bobby Bartellemeo | ||
| 2009 | Public Enemies | Harry Berman |
| Year | Title | Role | Notes | |
|---|---|---|---|---|
| 1984 | Silence of the Heart | Jeff | Television film | |
| The Facts of Life | Brian | Episode: "Smile" | ||
| 1984–1985 | St. Elsewhere | Rick Messina | 3 episodes | |
| 1985 | Amazing Stories | Jonathan | Episode: "The Mission" | |
| 1991 | The Chase | Phillip Hutchinson | Television film | |
| 1993 | Tribeca | "Red" Grady | Episode: "Heros Exoletus" | |
| 1994 | The Adventures of Brisco County, Jr. | Ned Zed | Episode: "Ned Zed" | |
| 704 Hauser | Joey Stivic | Episode: "Meet the Cumberbatchs" | ||
| 1996 | Too Something | Angry Competitive Guy | 2 episodes | |
| Mistrial | Detective Bobby Zito | Television film | ||
| 1997–2009 | Law & Order | Mr. Shuman / Green's Union Delegate / Bart Rainey | 3 episodes | |
| 1997 | Chicago Sons | Frank | Episode: "To Have and to Hold" | |
| Rose Hill | Fergus Carroll | Television film | ||
| 1999 | Jake Booker | Television film | ||
| Storm of the Century | Alton "Hatch" Hatcher | Miniseries | ||
| 2000 | Falcone | Ray Cerrone | 2 episodes | |
| 2002–2004 | NYPD Blue | IAB Captain Pat Fraker | 13 episodes | |
| 2003 | Oz | Detective Tarnowski | 2 episodes | |
| 2004 | Harvey Gruenwald | Episode: "Unrequited" | ||
| 2005 | The Inside | Billy Ray Pope | Episode: "Thief of Hearts" | |
| 2006 | Paul Sabotini | Episode: "Run Silent, Run Deep" | ||
| 2007 | EPA Official | Episode: "Loophole" | ||
| The Bronx Is Burning | Detective Welker | Episode: "The Seven Commandments" | ||
| 2007–2012 | Damages | Dan Williams | 12 episodes | |
| 2008 | New Amsterdam | Peter Huygens | Episode: "Golden Boy" | |
| 2010 | The Event | Frank Decosta | Episode: "I Haven't Told You Everything" | |
| 2012 | Blue Bloods | Josh Thorp | Episode: "Collateral Damage" | |
| Louie | Homeless Man | Episode: "Daddy's Girlfriend: Part 2" | ||
| White Collar | Bert "Bertie" Slavkin | Episode: "Parting Shots" | ||
| NYC 22 | Allen Blume | 3 episodes | ||
| Elementary | Michael McGee | Episode: "While You Were Sleeping" | ||
| 2013 | Killing Kennedy | Jack Ruby | Television film | |
| 2014 | The Blacklist | Sam Raimo | Episode: "Mako Tanida (No.83)" | |
| 2015 | Unforgettable | Greg Zartane | Episode: "Blast from the Past" | |
| 2016 | Billions | Seids | Episode: "Short Squeeze" |
| Year | Title | Voice role | |
|---|---|---|---|
| 2004 | Red Dead Revolver | Conductor / Hank Pullman / Jason Cornet / Cowboys #2 | |
| 2004 | Johnny Sindacco / Pedestrian | ||
| 2018 | Red Dead Redemption 2 | Wróbel |