Wow! What an episode! The Big Bang Theory season 9 episode 10.
Sheldon gets a song stuck in his head that he can't stop humming it but can't remember which song it is. The combination of these 2 things starts driving him crazy. It takes him more than half an episode to figure out which song it is.
Then he wonders why he had this song stuck in his head. The chain of reasoning takes him back to Amy and how she softened his life. This leads to Sheldon saying one of my most favourite romantic lines "She's like the dryer sheets of my heart."
I feel that that's an amazing way of thinking about a romantic partner, somebody who softens your life, someone who makes life more fun and who gives you the strength to face life's challenges. Love is the thing that makes you weak and strong at the same time!
The way they have written this episode, and how they have edited it - it is fantastic!
Also, the other man in the picture, the actor called "Stephen Merchant" (tall, British, Dave on screen) his role is so hilarious I was laughing out loud even when watching the episode a second time.
This is one of my very favourite episodes, my recommendation is - go and watch it again.
Generally speaking, the writers of TBBT are really good in writing fights and resolution scenes. There are so many that I can't name them all but see how they created then resolved the issue at the time of Leonard's marriage.