
...when the PLANET Krypton exploded.
The Big Bang Theory Season 2, Episode 11

Right now Howard
is staring down at our PLANET...
The Big Bang Theory Season 6, Episode 1

I used to pretend that my dad
had moved to the PLANET Melmac...
The Big Bang Theory Season 3, Episode 17

You know, don't you think
once an astronaut leaves the PLANET,
The Big Bang Theory Season 9, Episode 23

and you're free to leave
the PLANET if you want.
Money Heist Season 3, Episode 6