One of my favourite TBBT episodes is 7.3 "The Scavenger Vortex" which features the unlikely pairing of Howard and Amy discovering their mutual liking for the music of Neil Diamond.

This is set late season 9/early season 10, Bernardette is still pregnant.

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After the concert Howard and Amy got to go backstage to meet their musical hero.

Mr. Diamond Sir.

Call me Neil.

OK, thank you Neil, that was a great concert.

Thank you, what is your name.

I'm Howard.

And I'm Amy, thanks for a great evening Neil.

You look like a nice couple.

No, we are just friends, we both came with our other halves. My wife Bernardette is pregnant.

So my boyfriend Sheldon is looking after her whilst we are here backstage.

Well congratulations Howard, good luck with the baby.

Thanks Neil, if it's a girl we might call her Caroline after my favourite song.

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Meanwhile in a coffee shop next door to the concert hall.

So how are you feeling after the concert Bernardette?

A bit tired, he sang a lot of songs and then there were three encores!

Still Howard and Amy enjoyed it.

Yes they have been talking about this since Raj organised the scavenger hunt a couple of years ago.

That was a fun day, I am glad I packed the bowling ball.

We would have won if Leonard hadn't been so slow!

It is nice that our friends have a connection from outside the social group. Amy used to feel like an outsider when she first got to know us.

Howard still feels like an outsider some times.

Well if he were to get a doctorate?

Sheldon, be nice.

Bazinga!

Very funny.

How are you feeling about the baby.

Nervous and excited. It's going to be a big change for us but a part of me can't wait.

I am happy for you and Howard, but you know what I think about change.

You have changed a lot too Sheldon, just look at you and Amy. You could be having children of your own in a few years.

It would be interesting to make some Homo Novii, but I am not sure I could face such a big change.

Oh Sheldon, you and Amy are smart, you would work it out.

If if came to that I am sure I could work out a baby agreement.

Just don't make your child sign the agreement the day it is born!

I think that any child of myself and Amy would be smart enough to that.

Bazinga?

Bazinga!

It was a big step for me and Howie to get married but I am really glad that we did it. Do you see you and Amy getting married eventually?

It's a possibility.

I know that it would be a huge change for the two of you but if you really want to do it then you shouldn't waste too much time. Think about it Sheldon.

That is one of many things I am always thinking about.

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Howard and Amy entered the coffee shop

Howard "There you are honey."

Amy "Hello Cuddles."

Sheldon "So how was Mr. Carbon?"

Howard "He was great, isn't that right Amy?"

Amy "Yes he was. I hope that you weren't too bored waiting for us?"

Bernardette "No, Sheldon was good company. We had a nice time chatting."

Howard "Thanks for looking after her Sheldon, lets go home Bernie. Bye Amy."

Amy "So ready to go home Sheldon?"

Sheldon "Yes please, do you want to stop for a cup of tea afterwards, I want to talk to you about something..."