
In 1944, the Pacific Railroad
built number 6131,
The Big Bang Theory Season 7, Episode 15

down by the RAILROAD tracks."
Breaking Bad Season 2, Episode 12

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

I'm gonna be working on the RAILROAD
all the livelong day.
The Big Bang Theory Season 10, Episode 15

Well, Sheldon was going on and on
about time zones and RAILROAD schedules,
The Big Bang Theory Season 9, Episode 16