![You went out in the hallway,
stumbled into a portal...
You went out in the hallway,
stumbled into a portal...](https://content2.mcqstudy.com/ss/tbbt-4-9-00:03:35.699.jpeg)
You went out in the hallway,
stumbled into a PORTAL...
The Big Bang Theory Season 4, Episode 9
![It's just a portal to hell.
It's just a portal to hell.](https://content2.mcqstudy.com/ss/tbbt-12-9-00:06:37.962.jpeg)
It's just a PORTAL to hell.
The Big Bang Theory Season 12, Episode 9
![Newspapers? Did you find
a portal back to the 1990s?
Newspapers? Did you find
a portal back to the 1990s?](https://content2.mcqstudy.com/ss/tbbt-11-13-00:00:09.069.jpeg)
Newspapers? Did you find
a PORTAL back to the 1990s?
The Big Bang Theory Season 11, Episode 13
![...that could serve as a portal
to a parallel universe.
...that could serve as a portal
to a parallel universe.](https://content2.mcqstudy.com/ss/tbbt-6-8-00:00:13.445.jpeg)
...that could serve as a PORTAL
to a parallel universe.
The Big Bang Theory Season 6, Episode 8