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.
Frank Pembleton Francis Xavier "Frank" Pembleton is a fictional homicide detective on the television drama series "" portrayed by Emmy Award winning actor Andre Braugher. He is a primary character of the show through the first six seasons. Although the show featured an ensemble cast, Pembleton would become a fan favorite and is often identified by them as the show's signature character. He is based on Baltimore Police Department Detective Harry Edgerton, who, like Pembleton, was an eccentric New York bred African American detective in the BPD homicide unit featured in David Simon's book. "". The character also appeared in the "Law & Order" episode "Charm City".