The humor is multiplied when Raj and Howard lend their musical talents to the production as the house band.

Way to go with the catchy theme song, Footprints on the Moon!

I havent wanted to purchase a song this much since Thor and Dr. Jones.

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Credit: CBS

While Sheldon and Amy educate their flag-loving audience, Bernadette shares a secret with Leonard and Penny.

Amys apartment has been ready for weeks, but shes repeatedly told Sheldon the contractors are behind schedule.

Someones having fun with her experimental living situation.

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Sheldon eventually notices Amy deflects the conversation any time he mentions her apartment.

This is inconceivable conduct, especially since Sheldon shared his bodyandhis Netflix password with her.

Leonard caves and spills the beans regarding Amys apartment situation.

Leonard commandeers the conversation, warning Sheldon this is terrible advice.

Howard perks up and says he knows a secret Penny has been keeping from Leonard.

Does he want to know?

Howard is going to tell him anyway.

Penny has been secretly moving Leonards collectibles into storage a few items at a time for months.

Cue Sheldon and Leonard searching Leonards room for a certain Superman action figure.

He and Sheldon bond over the fact their significant others have been deceiving them.

The question is, should they confront Penny and Amy?

Or should they wait and see how far theyre willing to go with the charade?

The girls walk into the apartment and Sheldon immediately confronts Amy.

Leonard and Sheldon are confused.

I loved every second.

Amy jumps on the same bandwagon and starts speaking her secret language to Penny.

Both groups give a shot to work out the missing links as I laugh my head off.

Raise your hand if you Googled an English-to-Klingon translation site to double-check they were pronouncing dammit correctly.

Or was that just me?

Should Sheldon be mad at Amy for lying?

All she wanted to do is spend more time with him.

Should Leonard be mad at Penny for stealing his Batman key chain?

He didnt even notice.

Sheldon concedes he feels his living experience with Amy has been positive and hes open to continuing the arrangement.

Penny tells Amy in their secret language to be cool at this news.

It was the best moment of the episode.

That night, Sheldon struggles with the logistics of his new living situation.

Will they live at Pennys apartment or Amys?

Should they find something that is their own?

What about moving out of Pasadena?

Just when he begins to really freak out, Amy subtly hums the theme song fromStar Trek.

Amy launches into the familiar tune and Sheldon falls fast asleep.

Moments later, Sheldon scrambles out of bed.

He misses his old bedroom and wants to see it.

He crosses the hall, enters the apartment, and follows the sounds of a club beat.

He opens the door to see a scantily clad Penny whipping a chained-up Leonard in leather chaps.

How do you say 50 Shades of Nerd in Klingon?

Sheldons room has been turned into a sex dungeon?

Only in his nightmares thank goodness.

Does he want to live with Amy or not?

We find him standing in the hallway between his old apartment and the one he shares with his girlfriend.

Amy arrives looking puzzled.

I will file this away as uselessBig Bang Theoryknowledge right beside Schrodingers cat.

Raj: If were all going to die, why am I eating so much kale?

Sheldon: Everybody wants to spend more time with me.

Im like a man made of sugar in a world of ants.

Leonard: I got you this pink Power Ranger.

it’s possible for you to put it anywhere you like.

Penny: Okay, but you may feel some discomfort.

Episode grade: A