Don't own any characters

10th Doctor sometime after Martha

Also, NCIS's time line is skewed a bit (date doesn't fit in with the other time line. Ducky's mom is still alive)

Sorry it took a while to get this one up. I was camping and lacked internet access. Also, I've started writing another Doctor Who fan fic called Arethusa. It's going to loosely tie into Percy Bysshe Shelley's Arethusa. It also has the 10th Doctor in it and it will be on a steam punk ancient Greece sort of planet.

Mass Spectrometers and Sonic Screw Drivers

Part Six

The Second Favorite

The Doctor had a wonderful time with Ducky for dinner. Ducky's mother had made something that resembled a roast, but not quite. Ducky tried to explain to his mother that this Doctor was the same Doctor that he had introduced to her years and years ago.

"Donald, you're mistaken! This man looks nothing like the crickety fellow! Besides, that Doctor had much better teeth."

"What? What about my teeth?" The Doctor wined as he felt of teeth with his tongue.

Mrs. Mallard ignored him. "This man could be his son, Donald, but he certainly isn't the Doctor."

"Yes, mother, I was mistaken. I meant to say he was the Doctor's son. My words just came out wrong" Ducky rolled his eyes at the Doctor. Mrs. Mallard tapped the Doctor on the shoulder.

"Is your father married? Is he seeing anyone?"

"Oh, uh," the Doctor said, surprised," No, not at the moment…"

They continued through the night catching up with each other. told the Doctor of all of the work he had done since they last met in Edinburgh and the Doctor told Dr. Mallard about some the things he had been up to.

"You know what? I met myself just the other day."

"Really? A future Doctor or a past Doctor?"

"Past Doctor, the one that met you."

Ducky laughed, "Did you recognize yourself?"

"Well, I recognized him, but he thought I was a fan at first… or I…. or him…. It's a bit odd to talk about yourself. ANYWAYS! Our TARDISs crashed and fused to one. It created a paradox that could rip a hole in reality. But I fixed it, of course."

"Well if anyone could it would have been you"

The next day Mrs. Mallard kept trying to get the "crickety" Doctor's address from the Doctor until Ducky decided they would go to NCIS early that day. The Doctor agreed it would be a good idea. They got into the Morgan and Ducky started out towards NCIS. After they were out of sight of the house the Doctor pulled a letter out of his pocket.

"What do you have there?"

"Your mother slipped a love letter to my "father"."

"Oh, I'm sorry about that… Don't mind her, she does that."

"Hehe.. To my dearest Doctor. I don't know if you remember me, but I certainly remember you. Your brilliant eyes still flash in my mind. I met your son recently. He is the spitting image of you, though not entirely as handsome. Not as handsome? If you are ever in Washington D.C. you should come by for a visit. I would love to see you again, and if you know of any young ladies that Donald might like hehe you should bring them by for a visit as well. Donald is sweet man but I want grandchildren.."

"That's enough!" Ducky said irritated.

The Doctor chuckled. "I have to admit, Ducky, your mother is a barrel of laughs! Sending love letters and all of that! You really should read the rest of this. It'll make you blush! I know I did!"

Ducky eagerly tried to change the subject by asking what Director Vance wanted the night before.

"Well, I got through security with my psychic paper. The best ID I could think of was my UNIT one and now your Director Vance wants to know why he wasn't let in on a UNIT investigation. I told him there was no UNIT investigation, but I don't think he believes me. I also don't think that Agent McGee likes me, either."

"Can you blame him? He's very possessive of Abby and she is very interested in you."

"You think so?" The Doctor said as he grinned and they reached the NCIS parking lot.

"NO LEON, YOU DON'T UNDERSTAND!" Abby was nearly screaming at the video phone.

"Abby, maybe you shouldn't talk that way to the Director,"

"SHUT UP MCGEE. HE IS AN ALIEN! I DON'T CARE WHAT YOU SAY!"

"Miss Scuito, did you think that maybe your equipment is malfunctioning? Maybe it wasn't a hair."

"But, Leon, UNIT deals with aliens!"

"Miss Scuito where did you get your information?"

"Well," Abby started quietly," Google."

There was a knock on Abby's open door. Ziva and Tony came in carrying a box filled with evidence from the chief petty officer's house. The Director told Abby to get back to work and got off the video phone.

"Hello Abby!"

"Hello Ziva, Tony! What do you have for me today?"

"We searched chief petty officer Reed's house and we brought over some evidence we found," Ziva said as Tony set the box on the table. The big blue box in Abby's office caught Tony's attention.

"Ooo, Abby's new boyfriend is a magician!"

"He's not her boyfriend, Tony." McGee said as he rolled his eyes.

"Still jealous McGee?" Ziva smiled as she mocked him.

Abby had started going through the box's contents. She pulled out a laptop and started going through it's hard drive. Tony went into Abby's office to get a better look at the blue box. He tried opening the door, but it was securely locked.

"How did he get it in here?"

"We don't no, but Abby and I have been investigating the Doctor..."

"He's an alien!" Abby interrupted McGee.

McGee sighed, " He's not an alien, we just kept getting errors on the DNA test. Anyways, we got hits on several possible names for this guy, but some of them go back to the early 1900's. He's a con artist that has been cashing in on other people's past lives. There is no way his history goes back that far."

Abby stepped away from the laptop and walked over to McGee. "Timmy," she started, "You know I love you don't you? I mean I don't love you in a knock me off my feet and take me home with you kinda way, but in an I care about you and you mean alot to me kinda way." Abby hugged McGee. "You don't have to be jealous, your one of my best friends and one of my favorite persons in the entire world."

"Am I your favorite NCIS agents?" McGee asked her quietly.

Abby hesitated. "You're my favorite computer geek! Now, come over here and help me hack through this guy's laptop! There's a bunch of encrypted files that I can't decipher."

"Oh! Agent Gibbs! Could you show me where the Director is?" The Doctor said as he walked into the NCIS main floor. He and the Ducky had split up only a few minutes ago after Ducky received an urgent call about an autopsy. Gibbs looked up from his desk at the man. The Doctor smiled at him.

"I told him I would come back." Gibbs took out his phone and called Director Vance.

"Your guy is here, Vance... I'll tell him... I'll keep that in mind." Gibbs hung up the phone.

"Director Vance is busy. He told me to call him if and when you came returned. So, you cam back?"

"Well, yeah, I told him I would. Is Abby's lab opened? I need to check on my... property."

Gibbs nodded and smiled at the Doctor. "Yeah, she should be down there. I'll take you there, I need to see her anyway." He got up from his desk and grabbed his coffee. Gibbs quickly walked over to the elevator and the Doctor followed at his heels.

"UGH! This is giving me a head ache!"

"Whats the matter McGoo? Laptop too much for you?"

"Tony, please don't do that right now." McGee wasn't getting anywhere with the laptop. Abby looked over her shoulder at his failed attempts and shook her head. McGee wanted to help, but he made things worse. Abby had been working on running fingerprints that they found on the screen when McGee's moans of frustration broke her concentration.

"What do ya got?" Gibbs said loudly as he entered the lab, the Doctor came in right behind him.

"You're early! Hang on a second..." Abby stared at her computer for a second, then sighed. " I was sure that since you showed up I would get a hit. Oh, hey Doctor! How are you this morning? And," Abby came closer to the Doctor, "how did you get it in here?" The Doctor grinned a toothy smile.

"Abby?" Gibbs said impatiently.

"Well, I don't really have anything yet, Tony and Ziva just brought all of this to me not five minutes ago! I did find some fingerprints on the screen and McGee is working on decrypting some files we found on the laptop."

McGee sighed," And they aren't there anymore."

"WHAT?" Abby said as she rushed over to McGee. " But what happened?"

"I must have tripped a security program. It set off a virus that whipped the files, and it looks like what ever was left was re written. It's going to take hours to get the information back." McGee noticed that the Doctor was hovering behind him.

"Can I take a look?" He said as he took out his glasses.

"This is a NCIS investigation, I don't think someone outside of NCIS shou..." McGee was interrupted by Gibbs's hand on the back of his head. "Here have at it."

The Doctor beamed and winked at Abby. He started to tap keys and examine the computer's files

"Oh yeah, I see what you were saying... If I can just, no, wait I could, no, it would be quicker to just..." The Doctor's voice trailed off as he closed the laptop. He reached into his pocket and pulled out a stereoscope and a small, grey, pen shaped object. He put the stereoscope up to the under side of the laptop and listened. "Uh-huh..." The Doctor held the pen shaped object up to the laptop. The object buzzed and lit up with a blue light. "Molto bene!" the Doctor said as he put his things back in his pockets. "Should work good as new now."

McGee had his mouth opened and took the laptop. He opened the computer and all the files were perfectly decrypted and back in place. "It's all here boss, but how did you do that?"

The Doctor smiled modestly. " Well, I just run a file recovery, that's all."

Abby grabbed the laptop from McGee and looked it over for herself. "That's amazing! You're like a computer genius!"

"Well," the Doctor said as his grin grew larger.

McGee looked like his puppy had die. Ziva chuckled and whispered to McGee, "Second favorite computer geek."

Tony had to get in on McGee's humiliation, "Should have seen that one coming, Probie Wan Kenobi."

"Good work, Doctor. McGee, Ziva, DiNozzo, we need to go interview the Staff Sergent," Gibbs wasn't phased by the Doctor's antics, he just figured it wasn't out of the ordinary considering how little he knew about computers. Tony and Ziva where just as stunned as McGee. Abby was jumping up and down waving her hand. Gibbs noticed her, "Abby, what is it?"

"Can the Doctor stay?"

"What?"

"Can the Doctor stay? Can I keep him?"

"He's not a dog, Abby."

"If the Doctor is ok with it, can he help me with the computer? Doctor would you be ok with it?"

"Of course I am! This is brilliant! I would love to help you!"

"Gibbs? Can he stay?"

Gibbs smiled, "Well, we go bring in outside help at times, I don't see any harm in it."

"With all due respect, Boss, I don't think this is a good idea.."

"McGee, go get the car and leave the man alone." McGee backed down and left the room. Tony hehed at him as left.

"Alright, Abby, the Doctor can stay, but you need to tell the director he's down here so he know where he is. I'm tired of being his secretary." Gibbs left the room with Tony and Ziva. Abby turned to face the doctor and flashed an evil grin. She walked over to the door.

"Where should I start?"

"Oh, you can start by answering a few questions, Doctor," Abby said as she shut and locked the door.