It was a classic western
set in the post-Jurassic PERIOD,
The Big Bang Theory Season 9, Episode 14
Aren't you worried that sitting in the lobby
for a long PERIOD of time...
The Big Bang Theory Season 8, Episode 19
What time does the
trial PERIOD end?
The Big Bang Theory Season 11, Episode 14
So, your contract provides
for a three-day trial PERIOD,
The Big Bang Theory Season 11, Episode 14
...or B, more than nine nights
in a three-week PERIOD, or C...
The Big Bang Theory Season 2, Episode 10