Tell her about the URANIUM!
The Big Bang Theory Season 8, Episode 23
because Santa wouldn't bring him
enriched URANIUM.
The Big Bang Theory Season 7, Episode 10
...and told him it's against the law
to have yellow cake URANIUM in a shed.
The Big Bang Theory Season 1, Episode 4
That does it. I'm getting URANIUM.
The Big Bang Theory Season 4, Episode 18
...and then try to buy URANIUM...
The Big Bang Theory Season 4, Episode 18