U.S. LOCOMOTIVE
ever built?
The Big Bang Theory Season 7, Episode 15
If you knocked I couldn't hear you.
I'm welding this LOCOMOTIVE engine.
The Big Bang Theory Season 10, Episode 15
If you listen carefully when
the LOCOMOTIVE disconnects,
The Big Bang Theory Season 7, Episode 15
I bought an N-gauge LOCOMOTIVE.
The Big Bang Theory Season 5, Episode 3
So often, on the front of the LOCOMOTIVE...
The Big Bang Theory Season 8, Episode 21