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Looking to watch The Big Bang Theory Season 4 Episode 9 online? TV Fanatic is your destination for every paid and free streaming option of the The Big Bang Theory S4E9 full episode from 2 affiliates.

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Episode Details

The Big Bang Theory Season 4 Episode 9: "The Boyfriend Complexity"

Penny asks Leonard to fib to her father this week. Elsewhere, Howard, Raj and Bernadette go for an all-nighter with a telescope.