# S3-Scientific Breakthroughs

By [Big Bang Theory Fans](https://dylit.info/user/bigbangtheoryfans)

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Episode 7: The Guitarist Amplification When Penny invites a charming guitarist ex‑boyfriend to stay on her couch, Leonard’s jealousy spirals out of control and amplifies every minor annoyance into a potential breakup crisis. Sheldon, stuck in the middle of the arguing couple, regresses into childlike behavior and forces everyone to confront how conflict affects the entire friend group