Amy knocked on the door of apartment 4A at 2311 North Los Robles Avenue in Pasadena. A pretty blonde lady wearing a pink robe over pajamas answered the door. "May I help you?" she asked brightly over the angry voice of a man arguing over the phone.

"Don't you dare put me on hold again! I need an answer now. What did your company do to my luggage?"

"Don't mind him," the blonde said, stepping out into the hall and partially closing the door to help muffle the sound. "Can I help you?" she tried again.

"I believe he's looking for this," Amy tilted her head in the man's direction then motioned to the suitcase.

"Oh thank God. He's been whining about it ever since the drive home from the airport last night." She stuck her head in the door. "Sweetie, there's someone here with…"

"Not now, Penny," the man yelled as he waved her away and turned his back on her. Penny shrugged then invited their guest in, gesturing towards the couch's middle seat while taking the seat nearest the door.

"I'm sorry I'm the cause for your husband's anger." Amy said.

"You know Leonard?"

"Who's Leonard?"

"My husband."

"I thought his name was Sheldon. At least that's the name on the luggage tag." Amy looked from Sheldon to the tag and back again.

"Wait, you think Sheldon and I are married?" Penny laughed. "The only relationship Sheldon's in is with his spot on the couch," she said pointing to the empty cushion.

"I don't understand. You appear to cohabitate, and you referred to him as Sweetie."

"Leonard and I are Sheldon's roommates, and I call everyone Sweetie."

Just then another shorter man with glasses stepped into the living room. "Good morning pretty lady. Oh, I didn't realize we had company."

"This is Leonard. Leonard this is… Sorry I didn't get your name."

"I'm Amy, Amy Farrah Fowler."

"Hi Amy. Penny, I can take Sheldon to the train store if you and Amy want some girl time." Leonard suggested as he pulled a bottle of water from the fridge and took a swig.

"That's not necessary, Leonard. Penny and I just met. Also, I'm not sure what girl time entails. Besides, I'm here for Dr. Sheldon Cooper."

Leonard choked on a mouthful of water, "I'm sorry, what?"

"I picked up his suitcase by accident last night and came over to return it."

Leonard glanced over to Sheldon whose back was still turned to the group. He tentatively approached him. "Hey Buddy."

Sheldon covered the mouthpiece. "Leonard, can't you see I'm on the phone? These muggles still haven't located my luggage."

"Sheldon, your luggage is here."

"Don't be absurd, Leonard. You know very well I came home with nothing more than my messenger bag and the clothes on my back."

"Sheldon, a young lady came by to return your bag. She took it by accident."

Amy took a few tentative steps toward the angry man. "Dr. Sheldon Cooper, I'm Amy Farrah Fowler. I'm so sorry. I…"

Sheldon finally looked up and glanced at the unknown woman then to his suitcase and hung up the phone. He stood to his full height of 6 foot 2 and glared down at her 5 foot 4 frame. "Ms. Fowler, what were you thinking taking a bag without checking the nametag?"

Amy's emerald eyes steadily gazed up into his piercing blue ones. "Dr. Cooper, I pride myself on attention to detail. However, yesterday was very taxing on me. I was exhausted after a long day spent in airports, preceded by a five-day conference. I saw your suitcase thinking it was mine, as they are identical, and I wasn't in the right frame of mind to even think it belonged to anyone else. And it's DOCTOR Fowler actually."

Doctor? Sheldon scrutinized the woman standing before him, taking in her sensible orthopedic shoes, mid-length skirt, and button down shirt peeking out of a cardigan then up to her long, straight chocolate brown hair that fell just past her shoulders. She certainly looked respectable.

"My apologies Dr. Fowler. While I appreciate your coming down here to return my bag, I cannot excuse your actions. I wasted precious time on hold with the airline while I could have been solving the mysteries of dark matter. I'm a world renowned physicist."

"Again, I'm sorry. I will leave you to your problem solving. Good day, Dr. Cooper."

"Hang on."

"Yes?" Amy asked hopefully.

"How do I know you didn't pocket any of my belongings?"

"Excuse me?! I have been accused of many things but never stealing."

"Well just to be sure, I will go through my bag right now. Have a seat." Amy did as she was told.

Leonard spoke up, "Come on, Penny. Let's give them some privacy. We can go across the hall."

"And miss this? Not a chance."

"I'll give you a back rub."

"Fine," Penny consented. "It was nice to meet you Dr. Fowler."

"Please, call me Amy."

"Bye Amy. It was really nice of you to deliver Sheldon's suitcase, wasn't it Sheldon?"

Sheldon gave Penny a withering look.

Once they were out of earshot, Leonard said, "Well, she seemed nice. I kind of feel bad for leaving her alone with Sheldon."

"I think she can hold her own with him. Did you see how she stared back at him without flinching?"

Sheldon approached his suitcase, setting it down flat on the spot Penny vacated on the couch and carefully unzipped it. He peered in and found everything neatly folded; however, they were not folded correctly, according to his standards, and the items were not arranged where he had placed them.

After accounting for each article of clothing and toiletry product, he turned to face the stranger in his home. "You went through my whole suitcase? I could understand if you looked at one item and realized you had the wrong one, but to go through everything? Are you some kind of spy?"

"Dr. Cooper, how dare you accuse me when you don't have all the facts. Being a scientist, I should think you would look at all the possibilities.

"If you must know, your clothes were strewn throughout, probably due to a random security check. I initially thought they placed a few wrong items in my bag after the search. It wasn't until I had emptied the entire contents and saw your nametag that I realized my error. Rather than throw it all back, I took the time to replace it all with care."

"I do admire orderliness. Oh dear Lord, you touched my underwear!"

Amy blushed. "Dr. Cooper, what can I do to make it up to you?"

"Hmmm… Well, I was going to ask Leonard to me to the train store, but I suppose you could take me."

"Sure, I can do that."

"Don't think you're getting off that easy. I have a dentist appointment tomorrow. I'll need a ride."

"Fine, but can't you do these things yourself?"

"Oh, I don't ; I'm too evolved to be bothered with such mundane activities," he explained.

Amy didn't know how to respond. Sheldon shrugged into his jacket, slung his messenger bag over his shoulder, and picked up his keys. Amy took that as her cue to leave.

"Thank you Dr. Cooper for your understanding. Again, I apologize for the inconvenience. I will drive you to the dentist and train store tomorrow. What time would you like me to pick you up?"

"You may pick me up at Caltech in front of the physics department tomorrow promptly at 3:00 for my appointment. We're going to the train store now."

"Now?" Amy asked incredulously. "Dr. Cooper, I was out of town for a week. I have things I need to catch up on, like getting my luggage back for starters."

"But your mistake cost me hours of sleep and precious time on the phone, preventing me from using my mind for the greater good of science. You owe me."

Amy sighed. "You win, Dr. Cooper. I accept my punishment. I'll take you to the train store, but I'm going to the airport to get my suitcase after that."