May The 4th Be With You | The force is strong on The Big Bang Theory's set as Wil Wheaton & Mark Hamill are on hand for next week's big ShAmy wedding!
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Big Bang Theory' Enlists Mark Hamill, Kathy Bates for Wedding-Themed Season Finale – The Hollywood Reporter
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Big Bang Theory' actor Johnny Galecki says guest star Mark Hamill is obsessed with 'Roseanne' trivia
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