Int. Sheldon and Amy's apartment.
Sheldon: Are we really doing this?
Amy: Come our, Sheldon. We are doing this. A child is born and everyone followed the star.
Sheldon opens the door to the bedroom, and walks into the living room.
Sheldon: Why do I have to be Joseph?
Amy: Because I am Mary and Stephen is cute baby Jesus.
Bernadette, dressed as a shepherd, walks into the apartment followed by Halley and Michael dressed as her sheep. Bernadette walks to Amy who holds Stephen in her arms.
Bernadette: He is so adorable.
She kisses Stephen's cheek.
Howard, Leonard and Raj enter the apartment dressed as the three wise men. Then Stuart walks in, without a costume.
Stuart: I am so glad you invited me. As a photographer I am not on the picture but I can tell I was there when it all happened.
Penny runs into the apartment from the hallway, carrying her daughter Taylor, making her look like she was flying. Taylor was dressed as an angel and Penny as the shining star.
Penny: Look who is here. My beautiful little, angel, who guided us all here.
Leonard smiles. Howard moves closer to Leonard, as he only wanted him to hear it.
Howard: She doesn't talk about you. Now that our wives have kids, we are not the cute ones anymore.
Penny: The angel leads the way, and the shining star is following, as we heard someone special was born into our world.
Stuart takes some pictures.
Stuart: It feels like I am watching a Christmas play without looking at a screen.
Penny: And in which I am the star. How could I give up on that? It is so much fun, isn't it?
She looks at Taylor, who giggles, and gives her a kiss.
Sheldon walks to Amy.
Sheldon: Why cannot we dress as Supergirl and the Flash?
Amy: And who would Stephen be?
Sheldon: He is gonna be Baby Yoda.
Amy: How does that all fit?
Sheldon: Have you seen him? He is almost as cute as Stephen. You are super, girl and I am super fast at getting everything.
Amy: Yeah, and that is why we don't celebrate Christmas but go to Comic Con instead now.
Sheldon excited: Really? Oh yes. I will change.
Amy: Oh great. You are this fast that you already changed back into Joseph. Let's finally do the picture.
Sheldon looks confused.
Amy: We are doing this for your mother, remember? She did so much for you, she will be happy when she gets this picture on her Christmas card this year.
Sheldon: But I only love great things, and this is...
Amy: ...like dress up, and you love it.
Sheldon takes Stephen.
Sheldon: You do bring joy to this world.
He kisses Stephen who giggles.
Penny walks to them.
Penny: Stephen is a cute name. Maybe it's better knowing he gender before instead of picking a unisex name. But deep down I hoped for a little girl.
She looks at her daughter and both smile.
Penny: I mean, I just loved my lover...
Leonard: Aww, how sweet of you. I love my wife.
Penny looks confused at Leonard.
Penny: What? Oh sweetie. Anyway, I just loved my Lover album. I'm so glad I got a Swift and no Lautner. She will sing like an angel one day.
Penny and Taylor giggle again.
Sheldon to Amy: Who is she talking about?
Amy: Read Glamour.
Sheldon: How can I do that?
Amy: It's a magazine and a website about celebrities. Maybe we should invite Jessica over.
Sheldon: And who is that?
Amy: She was the nice reporter interviewing us in front of the building before we got our Nobel price. I thought you get everything so fast.
Sheldon: Why do I want to know her?
Amy: She knows things that you never will.
Sheldon looks confused. Raj walks over to Howard.
Raj: I am so excited about being a wise man, but you will be even more excited when you see what I wear underneath.
Howard: What? Oh please. Do you talk to everyone like that?
Raj: It's a cinnamon star sweater.
He showed his sweater with the head of his dog in the middle of a star.
Raj: There are even lights I can turn on.
He smiles all over his face when demonstrating the lights in the sweater, making the star sparkle.
Howard: Do never again complain that you will never get a girlfriend.
Stuart: It's so sad to see you. Maybe you should have a look at my girlfriend.
He shows him a photo of Denise on his phone.
Stuart: I just wish she were here instead of celebrating with her parents.
Amy turns to her friends, and speaks a bit louder.
Amy: Let's gather around the manger, and recreate the Christmas story.
Penny walks to Sheldon before they get into their spots in the manger they built in the apartment. Both are still carrying their kids.
Penny: Now you are finally human.
Sheldon looks confused.
Sheldon: I have always been one.
Penny: You only looked like one. Now you love and care.
Leonard walks between them, putting his right arm around Sheldon and left arm around Penny.
Leonard: It wasn't so bad she moved in next door a couple years ago, was it? You love her too.
Penny: Of course, look at me. Everyone loves me.
Sheldon: You were stupid enough to fall in love with Leonard.
Penny: Are you jealous?
Sheldon: No, I got the better wife. I am the genius with the Nobel price, remember?
Leonard rolls his eyes.
Penny: Let's ignore him. We are all happy now. Let's enjoy the present.
Amy: Stop talking, get together and let's do the photo.
They all pose, do the nativity scene and Stuart takes the picture until his phone rings. Stuart smiles.
Stuart: It's Denise. Hello, sweetie. Merry Christmas.
He turns around, so that Denise can see everyone in the video call.
Everyone: Merry Christmas.