I'm gonna be working on the RAILROAD
all the livelong day.
The Big Bang Theory Season 10, Episode 15
...an outdoor museum
featuring 43 RAILROAD engines, cars...
The Big Bang Theory Season 4, Episode 6
There are dozens of RAILROAD crossings
you have to blow the whistle for.
The Big Bang Theory Season 10, Episode 15
...a hot dog stand in a different
converted RAILROAD dining car.
The Big Bang Theory Season 4, Episode 6
Well, Sheldon was going on and on
about time zones and RAILROAD schedules,
The Big Bang Theory Season 9, Episode 16