Who would have thought that Sheldon Cooper loves to be an engineer and give up physics? "The Big Bang Theory" season 10 episode 15 shows that Sheldon wants to work on the railroad instead of working with Leonard and Howard on their project.

As written in Entertainment Weekly, Leonard and Howard ignores Sheldon when he comes up with a formula that can make their system even smaller. But the device was already approved then why would they start completely over? But Sheldon refuses to back down. Sheldon can be a pain sometimes as shown in "The Big Bang Theory" previously.

Frustrated Leonard pulls out a secret weapon he was holding on to for years which he bought for $4,000. It was the ticket for the ultimate train experience. "The Big Bang Theory" fans know Sheldon's love for the trains.

"The Big Bang Theory" anti-social star Sheldon gives rare hug to Leonard and rushes home to prepare Amy for their upcoming trip. Sheldon drones on and on about his locomotive agenda and Amy listens to him. Sheldon is very excited about the trip and asks many questions like will they stay in the caboose, can he perform track maintenance and who gets to memorize a very thick manual. Sheldon starts learning hand signals. First time in the history of "The Big Bang Theory", Sheldon likes engineering.

Meanwhile, Leonard and Howard enjoys their Sheldon-free lab. Colonel Williams comes to visit and he notices Sheldon's work on a whiteboard and now he wants to make the device smaller. Leonard and Howard try to convince him that it is just theory and they have already completed so many things but Colonel did not listen. Colonel is very strict as seen in previous episodes of "The Big Bang Theory".

According to Glamour, the latest episode of "The Big Bang Theory", what started out as a rare girls' night out became a therapy session of sorts in a bookstore's parking lot. Penny admitted there that she was sad that Bernadette had a baby and her life is not going well. Turns out that Bernadette is also not happy with her life. But Penny is sad that her life is not exactly as she dreamed of. She is married for two years and they are no further along than when they were dating. She is also not happy with her well-paying job as well. But according to everyone else in "The Big Bang Theory", she is living a perfect life with high-paid salary and settled husband.

Bernadette stops her right away and tells that she is constantly worried and tired. She also draws attention to the fact that Leonard is so in love with Penny that he married her two times. Amy is not sure about her future with Sheldon, what he thinks about their marriage. She becomes very sad and said through tears that she is not getting any younger and she thought that by now she should be married. Every fan of "The Big Bang Theory" knows that Sheldon is not the normal guy.

"The Big Bang Theory" episode "The Locomotion Reverberation" was quite entertaining and fun to watch. Many best moments were there including Sheldon's love for train engines and Leonard and Howard's try to get him back after spending $4k to send him away and girls' upsetting night out.

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