And to prove how SERIOUS I am about us,
The Big Bang Theory Season 10, Episode 5
How SERIOUS were you two?
The Big Bang Theory Season 7, Episode 19
Sounds SERIOUS. Have I been a bad boy?
The Big Bang Theory Season 10, Episode 23
...doesn't mean I want to have
a SERIOUS relationship.
The Big Bang Theory Season 4, Episode 6
That's awesome.
Serious?
Breaking Bad Season 2, Episode 10