
I'm SERIOUS,
JPL's actually developing a robot arm
The Big Bang Theory Season 10, Episode 7
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Howie, be serious."
Howie, be SERIOUS.
The Big Bang Theory Season 8, Episode 9

Oh, sounds SERIOUS.
The Big Bang Theory Season 5, Episode 7

I-I am SERIOUS.
The Big Bang Theory Season 12, Episode 3

I'm SERIOUS. I've always had these plans.
I was gonna be in movies...
The Big Bang Theory Season 6, Episode 21