...an outdoor museum
featuring 43 RAILROAD engines, cars...
The Big Bang Theory Season 4, Episode 6
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
Well, Sheldon was going on and on
about time zones and RAILROAD schedules,
The Big Bang Theory Season 9, Episode 16
...a hot dog stand
in a converted RAILROAD dining car.
The Big Bang Theory Season 4, Episode 6
In 1944, the Pacific Railroad
built number 6131,
The Big Bang Theory Season 7, Episode 15