What character did Mary Marg Helgenberger portray where she received several award nominations in the CBS police procedural drama?
Marg Helgenberger Mary Marg Helgenberger (born November 16, 1958) is an American actress. She began her career in the early 1980s and first came to attention for playing the role of Siobhan Ryan on the daytime soap opera "Ryan's Hope" from 1982 to 1986. She is best known for her roles as Catherine Willows in the CBS police procedural drama "" (2000–12, 2013) and the subsequent TV movie "Immortality" (2015) and as K.C. Koloski in the ABC drama "China Beach" (1988–91), which earned her the 1990 Emmy Award for Outstanding Supporting Actress in a Drama Series.
List of Law &amp; Order characters The American television police procedural and legal drama "Law & Order" (1990–2010) follows the cases of a group of police detectives and prosecutors who represent the public interest in the criminal justice system. Known for its revolving cast, most of the original stars had left the show within the first five seasons; though Dann Florek reprised his role of Capt. Donald Cragen on the spin-off series "" from 1999 to 2014, and Chris Noth reprised his role of Det. Mike Logan on "" from 2005 to 2008. The longest-serving main cast members of the original series include Steven Hill as D.A. Adam Schiff (1990–2000), Jerry Orbach as Det. Lennie Briscoe (1992–2004), S. Epatha Merkerson as Lt. Anita Van Buren (1993–2010), Sam Waterston as EADA/DA Jack McCoy (1994–2010) and Jesse L. Martin as Det. Ed Green (1999–2008). Long-running recurring cast members on the series include John Fiore as Det. Tony Profaci (1990–1998), Carolyn McCormick as Dr. Elizabeth Olivet (1991–2009), Leslie Hendrix as Dr. Elizabeth Rodgers (1992–2010) and J.K. Simmons as Dr. Emil Skoda (1997–2010).