The 77-year-old actor will play the father of Glenn Close's character Patty Hewes, reports TV Guide.
"They have many scenes together, and we'll have a deeper understanding of how she was formed into who she is," revealed executive producer Todd A Kessler.
He added: "There's a scene between Patty and her father in the finale that may be the strongest scene in the entire series."
The drama has lined up a star-studded new season including series regulars Close and Rose Byrne as well as Ryan Phillippe, Jenna Elfman, Victor Garber and Chris Messina.
Damages will return for its final and fifth season on July 11 at 9pm ET on DirecTV.
Watch a promo for season four of Damages below: