![[engine starts, revs]
[engine starts, revs]](https://content2.mcqstudy.com/ss/tbbt-12-3-00:19:39.352.jpeg)
[ENGINE starts, revs]
The Big Bang Theory Season 12, Episode 3

to stroll down memory lane:
Penny, your check ENGINE...
The Big Bang Theory Season 7, Episode 17

(ENGINE starts)
The Big Bang Theory Season 5, Episode 19

of working with my hands
on a train ENGINE,
The Big Bang Theory Season 10, Episode 15

that your check ENGINE light
was on?
The Big Bang Theory Season 7, Episode 17