Scott Bakula, David Newsom

Men of a Certain Age's second season will reunite Quantum Leap actors Scott Bakula and David Newsom, TVGuide.com has learned exclusively.

Newsom, who played Bakula's brother, Lt. Tom Beckett, on Quantum Leap, will play Mark, the younger sibling of Terry (Bakula), on the hit TNT drama. Mark is happily married with two children and runs his own successful home systems integration business.

Check out photos of the Men of a Certain Age cast

Terry, who now works as a car salesman with his friend Owen (Andre Braugher), hasn't seen his brother for some time. Terry decides to try to reconnect with him at his nephew's birthday party.

Newsom, 48, is best known for his role as Lt. Hank Metcalf on Homefront. He has also appeared on Melrose Place, Suddenly Susan, CSI, The Mentalist and Supernatural.

Men of a Certain Age, which also stars Ray Romano, returns for its second season on Monday, Dec. 6 at 10/9c on TNT. Newsom's episode is slated to air Jan. 3, 2011.