What does every wine tasting need?

An ex-boyfriend of course!

Do you know what always makesThe Big Bang Theoryfunnier than normal?

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Credit: Michael Yarish/CBS

Ill even go a step further.

Pairing Bernadette and Sheldon together as the non-drinkers of the group was simply delightful.

Add Pennys ex-boyfriend Zack to the mix and you have an episode of fun-filled frivolity.

The gang gears up for a night of discerning woodsy notes in various bouquets of wine.

Leonard consults a scratch-n-sniff wine tasting book while Raj contemplates which girlfriend he will invite.

Claire wins the toss, even though shes extremely intimidated by the thought of meeting all of Rajs friends.

He met Bon Jovi once, and all was right with the world.

Why is this a big deal?

He convinces Claire that the night will be super chill.

They are just friends.

Amy and Howard are the first to arrive at the wine bar.

Both are extremely uncomfortable without a buffer.

Dont they remember their Neil Diamond bond?

Start singing Sweet Caroline, and watch the magic happen, people!

Alas, Leonard, Penny, and Raj show up before Neil makes an appearance.

Raj reminds everyone not to talk about Emily in front of Claire.

Leonard makes a harem remark, and Raj warns him about karma.

As if on cue, Zack approaches the table, fisting the stem of a wine glass.

This should be fun.

Zack gets the 411 on whats been happening with the little band of science dudes.

Zack wonders out loud if the physicists are as smart as they think they are.

Before Leonard and Howard can hash out the reality of Zacks statement, Claire shows up.

She casually asks Penny and Amy if Raj ever has any other girls hanging around.

Everyone jumps in and covers for Raj.

Zack inserts himself into the conversation and questions why Raj hasnt nailed this one down?

And if hes not going to nail her down, can Zack nail her?

Raj begs Zack to calm down.

Then Claire inadvertently tricks Raj into admitting that hes seeing other people.

Like a wine that has gone bad, Rajs relationship with Claire has officially lost some of its bite.

Bernadette has never wanted to utter the phrase beer me more than this instant.

First on the agenda?

FYI, the answer is six.

Sheldon even creates a special Dungeons & Dragons game for Bernadette.

In this world, the men are pregnant and stuck at home trying not to pee when they laugh.

The entire bit was a sweet moment between two characters we rarely get to see interact with one another.

And it ended on the perfect note.

Sheldon offers to whisk Bernadette away to this enchanted world any time she needs a break from being pregnant.

But the offer expires in the third trimester.

Theoretical Laughter

Sheldon:When I was 5, I ingested a Z-gauge locomotive.

Howard:We absolutely know that our invention will not be used to destroy the world.

Howard:Because no one from the future has come back to kill us.

Sheldon:Friends are like toilet paper.

Its good to have extras under the sink.