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.