Susanna Thompson is an American actress best known for her role as Karen Sammler on the family drama television series Once and Again, from 1999-2002.
She also starred in the 2009 drama series Kings.
Thompson was also in the commercial narrative film American Pastime alongside Gary Cole, and in 2005, she was nominated for the Golden Star Award at Marrakech International Film Festival for her performance opposite Daniel Day Lewis in The Ballad of Jack & Rose.
Thompson has appeared in such feature films as Dragonfly (as Kevin Costner's late wife), Ghosts of Mississippi with Alec Baldwin, and When a Man Loves a Woman (with Meg Ryan and Andy Garcia).
Thompson has several primetime guest appearances ranging from NBC's hit series Law & Order: SVU, Chicago Hope, The X-Files, and a special two-hour Star Trek: Voyager as the Borg queen.
In 2007, she starred in the cable miniseries The Gathering with Peter Fonda, and held a recurring role on several seasons of NCIS opposite Mark Harmon.
Thompson earned a drama scholarship to San Diego State University, where she had the unique honor of appearing in theatre productions under the co-direction of Tony Award-winning playwright Tom Stoppard.
Thompson now resides in California with her husband. She is skilled in Aikido and stage combat.