The KEY is that while washing the dishes,
one should only be "washing the dishes."
The Big Bang Theory Season 9, Episode 9
It looks like an immensely
complex encryption KEY.
Westworld Season 2, Episode 5
...keeping in mind that the KEY
to a good lie lies in the details.
The Big Bang Theory Season 4, Episode 5
So, the KEY is
The Big Bang Theory Season 10, Episode 22
Confidence is KEY in these situations.
The Big Bang Theory Season 8, Episode 19