Can you figure out this week's Secret Theme rounds?

Each group of 10 otherwise unrelated questions has a theme running through their answers. Can you answer the questions and figure out the theme? Answers will be posted early next week.

Ray's Happy Birthday Bar:

1) What 1948 film was the first to give Alfred Hitchock both the production and direction credit? It's mainly remembered for unusually long continuous takes.
2) What song by the British glam band Sweet was recorded in 1973 but hit #5 on the US charts in 1975?
3) What nightclub, on West 45th St. in Manhattan until 1982, was the inspiration for a #1 song for Joey Dee & the Starliters in 1961?
4) What 2004 film starring Ben Kingsley and Aaron Eckhart had a plot of a serial killer killing other serial killers?
5) What does "WMDs" stand for, anyway?
6) What '70s soul singer, inducted into the Gospel Hall of Fame in 2004, is currently a preacher in Memphis, TN?
7) What fruit becomes palinka, slivovitz or rakija when its wine is distilled in various parts of Eastern Europe?
8) What 2005 film stars Michael Keaton as an architect trying to communicate with his dead wife?
9) What was "Yperite," a World War I weapon introduced in 1917?
10) Which character in the Brit-com Are You Being Served? cast was most likely to start a chain of the question "Are you free..?"

... and what theme links the 10 answers?

Dirty Frank's:

1) What American National Monument (named so in 1906) is called Mato Tipila in Lakota?
2) Green Lantern, Aquaman and the Martian Manhunter were founding members of what group?
3) Name the world's largest (most subscribers) Massively Multi-Player Online Role-Playing Game.
4) What 1997 film starred Matthew Perry and Salma Hayek?
5) What's the longest-running syndicated game show in US history?
6) What tech company invented NFS (Network File System), which allows computers to be networked?
7) What 1912 Thomas Mann novel features the character Gustav von Aschenbach?
8) What adventure comic strip's main character had an African sidekick named Lothar?
9) In what 1983 movie did Michael Douglas play Superior Court Judge Steven R. Hardin?
10) What 1968 best-seller by Erich von Däniken asserts that human religions came from outer space visitors? Supposedly non-fiction, this was one of the best-selling books of the decade.

... and what theme links the 10 answers?