Ilsa, the head of the institute.
That's clearly Penny.
The Big Bang Theory Season 11, Episode 15
Girls like Penny never end up with guys
who own time machines.
The Big Bang Theory Season 1, Episode 14
I'’m Penny.
This is Bernadette.
The Big Bang Theory Season 12, Episode 4
Guys are hitting on us, and
not just to get to Penny.
The Big Bang Theory Season 7, Episode 1
Penny! Penny!
The Big Bang Theory Season 5, Episode 2