Wait. In The Hitchhikers Guide
to the Galaxy...
The Big Bang Theory Season 6, Episode 8
Which is also called
The Hitchhiker's Guide to the Galaxy.
The Big Bang Theory Season 8, Episode 8
Hitchhiker's Guide
to the Galaxy.
The Big Bang Theory Season 7, Episode 6
Now, in the beloved novel
Hitchhiker's Guide to the Galaxy...
The Big Bang Theory Season 8, Episode 8
...so that he could write an entry about Earth
for The Hitchhiker's Guide to the Galaxy.
The Big Bang Theory Season 8, Episode 8