Authors notes: Anyone who doesn't know who 'Nancy' is to Doctor McCoy, go to: wikipedia dot org slash wiki slash TheManTrap and find out!

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Spock was insanely uncomfortable. His back was positively screaming in protest. He blearily opened on eye, than the other. He was lying on his back. He stared at the ceiling, trying to piece together the events before this.

//Why?// He thought //Why in the world am I laying on my back, in the cargo bay//

//You were shot// a helpful little voice inside his head supplied.

Spock rolled over. He felt his wrists catch and looked behind him. His wrists were bound behind his back and tied to a rather large crate.

"Lot of work…" He said, "Just to keep me here."

"Thank you." He whipped his head around, and saw Spark glaring at him with a good natured smile. "I do my best to keep prisoners in their places. You can sit up if you want to."

Spock sat slowly, his eyes darting around until they came to rest on a blue shirted figure. Doctor McCoy was curled into a ball facing away from them both.

"What's the matter with him? What did you do?" Spock asked.

Spark glanced nonchalantly over to McCoy. "I'm not sure." He shrugged, "Went Catatonic after I shot you." He turned an accusing pair of eyes on Spock. "He really likes you, you know?"

"Than what are you?" Spock glared, "Not a part of me?"

Spark let out his satanic grin again, "Nope, not a part of you at all. Although it did make for a good cover story."

"Who the heck are you?" It was an order, not a question. Spock shifted back slightly, ready to kick the man if he had to.

"Well, first of all. I'm not a man. Nor am I a woman." He shrugged, "You know what I'm saying?"

"No, elaborate."

Spark sighed, and leaning forward he said, "I am what ever I want to be. If I want, I can be you, I can be an old flame of Doctor McCoy's, and I can even be a salt vampire."

Spock stared, "Salt vampire?"

Spark shrugged, "M-113 ring a bell?" He laughed, "I can do what ever I want." He leaned forward. Spocks felt his eyes grow wide as the man changed. He shrank, and his features became more feminine. His hair turned a browner shade, even the clothes he wore changed.

At the end, it wasn't a he anymore. Before him was a full blown girl. "It's so easy to make any one think what I want them to think." She sighed, "Really, it almost takes the fun out of it."

There was a shuffle, Spock turned and saw the Doctor, eyes wide, staring at her. "Nancy?"

She smiled a lovely smile, "Yes, Leonard. It's Nancy."

McCoy struggled to sit up. He looked at her in awe. "Okay, now I am really confused."

She shrugged. "Just go back to sleep, dear. I'll take care of things for you."

Doctor McCoy paused, and looked at Spock. He slowly shook his head. "No, I need an explanation from you. Now."

She smirked, and a ripple went over her. Within seconds she was Spark again. "All right, but I can multi task." He turned around and began to dig through a nearby crate. "Where is it? I know I- Ah hah!"

He turned back around, a long thin blade held lightly in his fingers. He stood, and slowly made his way over to Doctor McCoy. "All right, an explanation is in order. I have been alive since before humans even thought to make fire. I can take any form I want, and," He kneeled down near the horrified Doctor, "I once took Nancy's form. I was her for a long time." He shrugged. "Now I'm not."

Spock watched with fear as Spark fiddled almost absent mindedly with the knife. "My only problem was; I couldn't have children. At least not by my self." He leaned forward, barely half an inch from McCoy. "Thanks, by the way, for hauling my child around all these years."

Spock could see McCoy gulp, "What are you going to do to him?" He asked.

Spark turned and glared at him, "None of your business, Spock. But because you are so adamant, I'll tell you. I'm merely going to take what's rightfully mine. The unborn child he carries." He examined the blade, "Although, I did promise to kill you. Maybe I should do that first…" He trailed off.

"Don't," Doctor McCoy whispered, "Don't kill him."

Spark turned, his satanic grin spreading across his face. "Oh? Who do you want me to kill? You, and keep the child. Or Spock?"

Spock sat up, "Don't answer that!" Spark turned and glared, "is there any way you can not hurt the Doctor?"

Spark shook his head, "Oh, no, he's going to feel a lot of pain. But if he chooses you, I can keep him alive."

Spock turned, "Doctor, I-" He paused. He could see the determination in the Doctors eyes. It had replaced all fear. He knew no amount of arguing would change what the Doctor was about to do.

He turned to Spark. "Go ahead and kill me, but don't hurt Spock."

Sparks eyes flickered, and he grinned. "I'm glad," He said, "That we could come to this mutual agreement." He raised the knife, and slowly brought the blade down.

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Authors notes: Originally, I wasn't going to do that. It was like, 'what would happen if...' and all of a sudden I could see the plot!