Coming up on Without a Trace:

"Freefall" -- The team searches for Jack's friend, a longtime FBI agent, who disappears after leaving an emotional message on the answering machine for his wife about the murder of his partner. The team investigates whether the industrial espionage case that Max and his partner, Jimmy, were working on is connected to Jimmy's murder and if Max is now a victim of Jimmy's killer. They soon learn that, as a safety precaution, Max attempted to pull Jimmy from the case, but that Jimmy threatened to tell Anne a secret about Max if Max removed him. Now, the team has to consider Anne as a possible suspect in her husband's disappearance.

Academy Award nominee and Tony Award nominee Mary Elizabeth Mastrantonio guest stars in a recurring role as FBI agent Anne Cassidy, the missing Max Cassidy's (William Russ) wife.