Author's note: The series resets with this episode. Remember that as this story progresses, many times they resume the storyline as if never having sex before with each other. So is the case in this episode.
*****
The four nerds were coming up the stairs after being destroyed in a paintball battle. On the second landing they came across Penny who was on her way to work at the Cheesecake Factory. She looked amazing as always with that vest just covering the lower portions of her large breasts. The frilly blouse under the vest was unbuttoned to the middle of her breasts giving the nerds and her customers later at work a good view of them. It always insured her larger tips.
"So how was paintball?"
Sheldon spoke up; "It was a disaster, we got creamed."
"Oh I'm sorry, listen I'm having a party on Saturday, so if you're around, come by."
Howard broke in; "A boy-girl party?"
She looked uncomfortable, well because it was Howard asking; "Well there will be boys and there will be girls and it is a party, so...Just a bunch of my friends, we'll have some beer, do a little dancing."
Sheldon was really nervous now; "Dancing?"
Leonard tried to save the day; "Yeah, I don't know Penny...Thing is, we're not... We're really more of a..."
Sheldon broke in again; "NO!"
Again Leonard stopped him; "But thanks, thanks for thinking of us."
Penny threw her arms up; "Are you sure? It's Halloween!"
All of a sudden Sheldon was interested; "A Halloween Party?"
She replied tentatively; "Yeah."
Howard looked at the other three; "With costumes? Is there a theme?"
She didn't understand; "Uh yeah, Halloween!"
Sheldon stepped forward; "Yes, but are the costumes random or genre-specific?"
She shook her head and her eyes bugged out; "As usual, I'm not following?"
Leonard tried to clarify things; "He's asking if we can come as anyone from science fiction, fantasy..."
"Sure!"
"What about comic books?"
"Fine!"
"Anime, TV, film, D&D, manga, Greek, Roman, Norse gods..."
She stopped him; "Anything you want! Okay, any costumes you want. Bye, I have to get to work!"
She left and they stood in the lobby of the second floor. Suddenly Howard rose up on his tiptoes; "Gentlemen, to the sewing machines."
The day of the party arrived and there was a knock on the door and Leonard came running out of his room dressed as the Flash, he yelled out; "I'll get it!" I opened the door and Howard stood there also in a Flash outfit, they both yelled out; "Oh No!"
Just then Sheldon came out of his room and saw them both and yelled out too; "Oh no!
Just then Raj came through the door yelling; "Make way for the fastest man alive." He stopped when he saw the other three also dressed as the Flash and he too yelled out; "Oh No!"
Sheldon was pissed; "See this is why I wanted to have a costume meeting!
They agreed to change and no one would be Flash. Leonard ran from the living room; "I call Frodo!"
They ended up in the living room Leonard was dressed as Frodo; Howard was Robin Hood, but looked more like Peter Pan. Raj came in dressed as Thor and just then Sheldon walked in dressed as the Doppler Effect.
Leonard didn't want to be embarrassed by Sheldon in front of Penny's friends and told him not to do so. They went over to Penny's and knocked on the door.
She answered the door, still in her everyday clothes; "Oh hey guys."
Leonard spoke up; "Hey, sorry we're late!"
"Late? It's only 7:05."
"Yeah and you said the party starts at seven."
"Yeah, I mean, when you start a party at seven, no one shows up at, you know, seven."
Sheldon breaks in; "It's 7:05."
She smiled at them; "Yes, yes it is. Okay, well, um, come on in!"
They all walk in slowly and look around, they notice no one else is there yet and Howard turns to Penny; "What, are all the girls in the bathroom?"
Penny stifles a laugh; "Probably, but in their own homes."
Sheldon asks about the prizes for best costumes and Penny tells him there isn't going to be any prized.
Sheldon is really upset; "This party is really going to suck!"
"No, come on, it's gonna be fun. And you all look great. I mean look at you, Thor and oh, Pete Pan. It's so cute."
Leonard interrupts her; "Actually, Penny, he's Robin..."
Howard stops Leonard; "I'm Peter Pan and I've got a handful of pixie dust with your name on it!"
She looked disgusted and shakes her head from side to side; "No you don't! Hey, what's Sheldon supposed to be?"
"Oh, he's the Doppler effect."
Sheldon steps forward; "Yes, it's the apparent change in the frequency of a wave caused by relative motion between the source of the wave and the observer."