
Sheldon, you can't TRAIN my girlfriend
like a lab rat.
The Big Bang Theory Season 3, Episode 3

leading a TRAIN
of meticulously restored
The Big Bang Theory Season 7, Episode 15

How many times do you think
you stepped off that TRAIN?
Westworld Season 2, Episode 6

That's what my TRAIN used to do.
The Big Bang Theory Season 8, Episode 22

...make it a TRAIN day.
The Big Bang Theory Season 4, Episode 6