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.
Anita Van Buren Lieutenant Anita Van Buren is a fictional character on NBC's long-running police procedural and legal drama television series "Law & Order", portrayed by S. Epatha Merkerson. Van Buren appeared in 390 episodes of "Law & Order". By episode count, she is the longest-running character on the original show. Van Buren appeared in 392 episodes within the franchise (390 of "Law & Order", the "" episode "Badge" and the "" episode "Skeleton") and "", and is the third longest-running regular character in the "Law & Order" franchise, behind Olivia Benson (Mariska Hargitay) and Donald Cragen (Dann Florek), and the fourth longest-character in the "Law & Order" universe, behind Benson (410 episodes in ), Cragen (400 episodes in the franchise), and John Munch (Richard Belzer) (246 episodes in the franchise).