Watch The Big Bang Theory Season 7 Episode 18 Online [S07E18] for free. Download full show of The Big Bang Theory S07E18. Latest episode of The Big Bang Theory
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Season 07, Episode 18 – “The Mommy Observation”
Howard and Sheldon tour NASA in Houston and pay a visit to Sheldon’s mother, who greets him with a surprise. Meanwhile, back at home, Raj surprises the rest of the gang with a murder-mystery game-playing evening that’s not the killer party he expected it to be.