...an outdoor museum
featuring 43 RAILROAD engines, cars...
The Big Bang Theory Season 4, Episode 6
In 1944, the Pacific Railroad
built number 6131,
The Big Bang Theory Season 7, Episode 15
You'd have to drive a RAILROAD spike into
his brain for me to beat him at checkers.
The Big Bang Theory Season 2, Episode 11
...um, I embarked
on a RAILROAD journey of healing...
The Big Bang Theory Season 8, Episode 1
I'm gonna be working on the RAILROAD
all the livelong day.
The Big Bang Theory Season 10, Episode 15