Mazzie, according to the actress' official website, will be seen on the May 11 broadcast of the series, which concerns the New York Missing Persons Squad of the FBI. The May 11 episode is titled "White Balance," and Mazzie will portray the mother of a missing boy. Tony Award winner Viola Davis will also guest star on this episode. "Without a Trace" airs Thursdays at 10 PM ET on CBS; check local listings. The cast of the drama series includes Anthony LaPaglia as Jack Malone, Poppy Montgomery as Samantha Spade, Marianne Jean-Baptiste as Vivian Johnson, Enrique Murciano as Danny Taylor, Eric Close as Martin Fitzgerald and Roselyn Sanchez as Elena Delgado.

A three-time Tony Award nominee for her performances in Kiss Me, Kate; Ragtime; and Passion, Marin Mazzie's other theatrical credits include Into the Woods, Big River, The World Goes 'Round, the City Center Encores! production of Out of this World and Off-Broadway's The Trojan Women: A love Story, where she met husband Jason Danieley. Mazzie also starred in the London production of Kiss Me, Kate, where she earned an Olivier Award nomination for her work.

For more information visit www.cbs.com/primetime/without_a_trace.