Robert John Wagner Jr. is an American actor of stage, screen, and television. He is known for starring in the television shows It Takes a Thief (1968–1970), Switch (1975–1978), and Hart to Hart (1979–1984). He later had recurring roles on Two and a Half Men (2007–2008) and NCIS (2010–2019).

It Takes a Thief is an American action-adventure television series that aired on ABC for three seasons between 1968 and 1970. It stars Robert Wagner in his television debut as sophisticated thief Alexander Mundy, who works for the U.S. government in return for his release from prison. For most of the series, Malachi Throne played Noah Bain, Mundy's boss.