<P> His brother, David, said in an interview that Keith could play any instrument he wanted, including bagpipes and the French horn . Like David, Keith integrated his musical talents with his acting performances . In 1975, he performed a song he'd written, "I'm Easy", in the movie Nashville . It was a popular hit, and Carradine won a Golden Globe and an Oscar for Best Original Song for the tune . This led to a brief singing career; he signed a contract with Asylum Records and released two albums--I'm Easy (1976) and Lost & Found (1978). In 1984, he appeared in the music video for Madonna's single "Material Girl ." In the early 1990s, he played the lead role in the Tony Award - winning musical The Will Rogers Follies . </P> <P> In 1972, Carradine appeared briefly in the first season of the hit television series, Kung Fu, which starred his brother, David . Keith played a younger version of David's character, Kwai Chang Caine . In 1987, he starred in the highly rated CBS miniseries Murder Ordained with JoBeth Williams and Kathy Bates . Other TV appearances include My Father My Son (1988), a television film . In 1983, he appeared as Foxy Funderburke, a murderous pedophile, in the television miniseries Chiefs, based on the Stuart Woods novel of the same name . His performance in Chiefs earned him a nomination for an Emmy Award in the "Outstanding Supporting Actor in a Limited Series or a Special" category . Carradine also starred in the ABC sitcom Complete Savages, and he played Wild Bill Hickok in the HBO series Deadwood . </P> <P> Carradine hosted the documentary Wild West Tech series on the History Channel in the 2003--2004 season, before handing the job over to his brother, David . In the 2005 miniseries Into the West, produced by Steven Spielberg and Dreamworks, Carradine played Richard Henry Pratt . During the second and fourth seasons of the Showtime series Dexter, he appeared numerous times as FBI Special Agent Frank Lundy . Carradine is credited with guest starring twice on the suspense - drama Criminal Minds, as the psychopathic serial killer Frank Breitkopf . Other shows he appeared in include The Big Bang Theory (as Penny's father Wyatt), Star Trek: Enterprise ("First Flight" episode) and the Starz series Crash . Carradine also made two guest appearances on NCIS in 2012 and 2014 . Also in 2014, he had a recurring role as Lou Solverson in the FX series Fargo, followed by a recurring role as President Conrad Dalton on Madam Secretary . He was promoted to series regular, starting with the show's second season . </P> <P> In 2012, Carradine lent his voice to the video game Hitman: Absolution, voicing the primary antagonist Blake Dexter . </P>

Who played penny's dad on big bang theory
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