Big Bang Theory - 'The Cooper/Kripke Inversion'

Howard found a website that sells personalised action figures that look like people, Leonard wants one until Penny is less than enthused. Then he doesn't want one. And Sheldon doesn't want one unless it comes with Kung-Fu grip.
Sheldon is narrating his work on his board and then Kripke comes in. Even though his name is in the title of the episode, I was still excited to see him! Sheldon turns his board over to hide his work, then hides it because he doesn't want him to see the picture of the cool train on the other side! They have to work together. This will be interesting.

Don't look at my train!!!

Raj and Howard's dolls arrive and look nothing like them, Raj's is black and Howard's has a HUGE nose.
Sheldon has 'I'm unhappy and I want to destroy the world' music haha. Also Penny asks if he's OK and he says 'there is ominous music playing and I have an afghan over my head, I dont know what world you come from but where I come from, that means I am not doing OK!' The proper drink for someone who is in despair and outraged at the same time is hot apple cider with cinnamon sticks. 

Yea he doesn't look OK. Looks like he's plotting to build a Death Star, maybe...

Kripke comes in and they trade work, but Sheldon gives him an envelope with blank paper. Then another one. BURN!
Raj and Howard decide they need a 3D printer, so they can make their own action figures.
Then apparently Kripke's research is way better than Sheldon's, which means that 'the mommy of the smartest physicist at the University is not my mommy, as I'd thought. It's his mommy!!' and Sheldon starts crying, so Amy hugs him, and it's awkward but really sweet.
Then Sheldon doesn't want to go to work because he doesn't want to face Kripke - and Leonard sees through Sheldon's plan of puttin the thermomoter in his tea. So Sheldon's not even smarter than Leonard now! And then Leonard middle-names him, so he agrees to go off to work. and Leonard is like 'OMG how did I do that?! I gotta remember how I did that!'
Howard manages to make a whistle with the 3D printer, and it only took 3 hours! And it works as well as a store-bought whistle!
Kripke thinks that the reason Sheldon's research wasn't very good is because he has a girlfriend, and is distracted by her... And then Sheldon busts out some very awkward sentences about how he and Amy are having lots of sex. Kripke is jealous and tries to give sheldon a fist-bump, which makes Sheldon do his 'are you serious?' face.
Then Howard shows Bernadette the dolls he made of her and himself, and she loves them...

So cute. So freaking cute.

... Until he tells her about the $5000 printer he bought in order to make them. Then she's pissed. And threatens to cut him off unless he sells the machine. So he's bummed about that.
Then Sheldon tells Penny and Leonard about the rumor he and Kripke started about his relationship with Amy, and Penny asks 'soo... are you ever going to sleep together?' and Leonard is like 'dude! We don't ask him those questions?' and then Sheldon actually considers it, and after a long discussion, says 'possibly.' Which causes Penny to make this face:

I saw it in the promo, and I was anticipating it so much...
Does she look slightly sunburned to anyone else??

And she slaps Leonard several times and goes OH MY GOD hahaha but she also looks like she's about to laugh, hmm...
Howard sells the 3D printer to Raj (because that dude's rich, he can afford it!) and I'm praying that we get to see more of that thing, because it could lead to some fascinating storylines!
And Sheldon keeps talking to Kripke about how he and Amy were having sex the night before, and Kripke is a perv... Which somehow seems even more pervy with his voice than a normal person O.o
But this episode was hilarious nonetheless.