
...Superman cleans his uniform
by flying into Earth's YELLOW sun...
The Big Bang Theory Season 2, Episode 11

"putting a terrifying,
giant YELLOW bird on television
The Big Bang Theory Season 12, Episode 4

...YELLOW is frightened...
The Big Bang Theory Season 4, Episode 22

Yunkai. The Yellow City.
Game of Thrones Season 3, Episode 7

...and told him it's against the law
to have YELLOW cake uranium in a shed.
The Big Bang Theory Season 1, Episode 4