
LEONARD: Oh, my God,
there's a breach in the RADIATION unit.
The Big Bang Theory Season 1, Episode 11

Perhaps more if that RADIATION
gave you a super brain.
The Big Bang Theory Season 11, Episode 17

...even though she would later die a slow,
painful death from RADIATION poisoning.
The Big Bang Theory Season 1, Episode 2

- What? What happened?
- Radiation burns.
The Big Bang Theory Season 2, Episode 9

...on the theory
of RADIATION and quanta.
The Big Bang Theory Season 4, Episode 2