Frank Langella played which title role on Broadway and in a 1979 film?

Complete the title of the 1979 sci-fi series: "Buck Rogers in ___". Which 1979 Tony-winning play is about Joseph Merrick, whose deformities led people to treat him as a spectacle? What was the numerical title of the 1979 Blake Edwards comedy starring Dudley Moore and Bo Derek? In which 1979 film does Robert Duvall say "I love the smell of napalm in the morning"? Whose album "52nd Street" won the Grammy for Album of the Year? Who had a 1979 No. 1 hit with "Hot Stuff"? In which 1979 film does a father ask a court "what law is it that says a woman is a better parent simply by virtue of h… Kurt Russell played which "King" in a 1979 TV film directed by John Carpenter?