
...but there is a reasonable EXPLANATION.
While I slept in my sleeper car...
The Big Bang Theory Season 8, Episode 1

The more likely EXPLANATION for your attire
is that you're out of clean clothes again.
The Big Bang Theory Season 2, Episode 19

The only logical EXPLANATION
is that this is a dream.
The Big Bang Theory Season 5, Episode 20

I did say that was
one possible EXPLANATION.
The Big Bang Theory Season 12, Episode 20

Raquel was trying to find
an EXPLANATION to that,
Money Heist Season 1, Episode 11