Robert John Wagner, Jr. (pronounced ; born February 10, 1930) is an American actor of stage, screen, and television, best known for starring in the television shows It Takes a Thief (1968–70), Switch (1975–78), and Hart to Hart (1979–84). He also had a recurring role as Teddy Leopold on the TV sitcom Two and a Half Men and has a recurring role as Anthony DiNozzo Sr. on the police procedural NCIS.