The Big Bang Theory (2007–2019)
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The Locomotion Reverberation 

Leonard and Howard's attempt to keep Sheldon away from their Air Force project by sending him on a train trip backfires. Penny and Amy take Bernadette for her first night out since having the baby.


Mark Cendrowski


Chuck Lorre (created by), Bill Prady (created by) | 6 more credits »


Episode complete credited cast:
Johnny Galecki ... Leonard Hofstadter
Jim Parsons ... Sheldon Cooper
Kaley Cuoco ... Penny Hofstadter
Simon Helberg ... Howard Wolowitz
Kunal Nayyar ... Raj Koothrappali
Mayim Bialik ... Amy Farrah Fowler
Melissa Rauch ... Bernadette Rostenkowski
Kevin Sussman ... Stuart Bloom
Pamela Adlon ... Halley Wolowitz (voice)
Dean Norris ... Colonel Richard Williams




The work on the guidance system is going smoothly enough, with the exception of Sheldon making one unnecessary suggestion after another just to satisfy his own sense of making it perfect. The latest such suggestion is solely a half thought-out theory of how to make the unit smaller, the current model toward which they working being within the approved specs. Leonard decides the work at this point would go much easier without Sheldon, and thus he implements a long thought out plan, one which he has been saving for a crisis moment, which he believes this is. The plan?: give Sheldon a gift of the ultimate locomotive vacation, one where he actually gets to operate a train. Sheldon ends up being enthralled with the gift. However, things take a turn when Colonel Williams asks Leonard and Howard to create a product that is the size Sheldon has devised. Leonard's plan has worked a little too well in that Sheldon refuses to forgo his trip to come back to work. If Leonard can devise a plan to ... Written by Huggo

Plot Summary | Add Synopsis


Comedy | Romance


TV-14 | See all certifications »

Did You Know?


This episode was taped on January 17, 2017. See more »


Sheldon attempts to repair a diesel engine that is supposed to be from a locomotive. However, the engine shown is far too small and is the size of an engine more appropriate for a truck, bus, or boat. A diesel engine from a locomotive would be 3-4 times larger than the one shown. See more »


[first lines]
Howard Wolowitz: OK. I'm zeroing out the electro-osmotic flow rate in the micro-fluidic channel.
Leonard Hofstadter: Nicely done, Howard.
Howard Wolowitz: Well, my wife is four foot ten and sexually satisfied, so clearly I know my way around tiny things.
Leonard Hofstadter: Good for you. On the cutting edge of new technology and still making inappropriate comments about the mother of your child...
Howard Wolowitz: And those are just the things I say out loud.
Sheldon Cooper: Gentlemen, we need to stop immediately.
Howard Wolowitz: What's wrong?
Sheldon Cooper: I've been looking at the math, and I think we can make the ...
See more »

Crazy Credits


For Immediate Release January 20, 2017 EXECUTIVE ORDER


By the power vested in me as President by the Constitution and the laws of the United States of America, it is hereby ordered as follows:

Section 1. It shall be the policy of my administration that, in any given circumstance, the truth is what I say it is, or need it to be.

Section 2. Any statement, photograph or report that does not align with Section 1 shall be deemed "fake news."

Section 3. Contradiction of Section 1 or Section 2 shall be punishable by mean tweet.

Section 4. Handwriting analysis of my signature (see below) is fake news. See more »


References The Godfather (1972) See more »


Rock You Like A Hurricane
Performed by Scorpions
See more »

User Reviews

short review in bad English
23 May 2017 | by darkdopeSee all my reviews

short review in bad English:

since German humor is drastically dying out since a few years (and everything became politically correct-only), it is no wonder that one of the funniest and smartest and maybe most successful comedies ever is aired approx. 8 episodes per day (no joke) on the German channel Pro7. We have nothing that can compete in europe. If we try everyone feel ashamed.

I highly fell in love with the first seasons after a while, especially due to the Cooper character and his performed knowledge in all thinkable areas of knowledge from sociology, philosophy, economics, to physics of course. This generated amount of knowledge summed up with very good humor and a brilliant variety of so many characters, which are mostly authentic and individualistic, made this show unique.

Therefore my hope: please, creators of this gold, don't let it become a soap opera.... A downfall of quality after such a big success, just like with the simpsons, is understandable. success makes lazy. But the creators will realize that such a dead end will ruin the whole thing created. Please, put as many effort in the last season as possible.

And please, if there is a higher might, let Melissa Rauch become single and move to europe in the coming years..

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English | Spanish

Release Date:

9 February 2017 (USA) See more »

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Technical Specs


Sound Mix:




Aspect Ratio:

16:9 HD
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