Penny was the teacher.
When the light turned YELLOW...
The Big Bang Theory Season 3, Episode 16
I'm just saying it's pretty lame
that he can be defeated by the color YELLOW.
The Big Bang Theory Season 2, Episode 19
Just flip the switch until the lights
on the drone change to solid YELLOW.
The Big Bang Theory Season 8, Episode 22
- He has YELLOW teeth...
- That's enough, Talla.
Game of Thrones Season 6, Episode 6
The prisoners from the Yellow Fork.
Game of Thrones Season 2, Episode 7