"A single vehicle's been let through the gate," one of the remaining Secret Service agents relayed to his captors as he'd been ordered to do by the voice of Agent Price on his radio earpiece.

O'Neill and his wife sprang towards the shattered window. They hugged the wall near the window, O'Neill behind his wife, minimizing their silhouettes to those outside. From this vantage point, they could just make out the shape of the approaching SUV. As it came to a halt, Sam took a deep shuddering breath then another. O'Neill placed his hands on her upper arms rubbing gently. It was obvious that he intended the gesture to have a calming affect on his wife, but the others in the room couldn't help but notice it had a similar affect on O'Neill himself.

"I'm going out there," she suddenly announced.

"Sam," Jack chided.

"Someone's got to go out and get them," she retorted. "I'm going."

"They can be brought to us," Daniel argued.

"No," she declared with absolute finality in her voice as she moved away from her husband. Clark watched as she moved with quiet efficiency towards him. "Mr. Clark, we're going for a walk," she told him as she knelt and cut through the bindings around his ankles.

"Sam," O'Neill warned quietly.

"I...I think I feel something, Jack" she confided. "I need to get closer to be sure though."

"Something?" her father questioned. "Something as in what?"

"As in a symbiote," she admitted.

"I don't sense anything," Jacob announced as he threw a questioning look to the two jaffa.

"I, too, sense nothing," Teal'c agreed while his mercurial mentor, Bray'tac, merely nodded his own agreement.

"Please don't take offense, Selmak," Sam asked, "but it's like going to the home of somebody who owns a dog. Visitors to the house notice the smell of the dog, but the owner is used to it and doesn't." She could have explained in more detail why she might sense a symbiote and they would not. It had started as a game on Panersh to occupy her mind while she labored in the fields. As she weeded the fields of crops, Sam had tried to sense the location of the jaffa around her without looking. Within a few weeks she realized she was getting better at it the more she practiced. She had also realized that this ability could be the deciding factor between failure and success when the time came for she and O'Neill to make their escape. What had started as a game quickly became a training regime that rivaled any other she'd ever done.

Jacob's head slipped down momentarily. "I cannot say I like the comparison," Selmak said, "but the analogy is sound." His head dipped slightly as Jacob resumed control. "That still doesn't mean you should go out there," he argued.

"What are the chances that it's a Tok'ra?" Sam demanded of her father. "If a Goa'uld has my children, I damn well am going to find out!"

"Then I'll go with you," Jack suggested.

"No," Sam refused as she tugged Clark to his feet. "If I'm wrong, Mr. Clark and I are just going to go for a little walk, and when we get back, we'll have the twins with us. If I'm right, I want you in here...out of sight, but ready to back me up."

Jacob threw up his hands recognizing in her expression that he hadn't a chance of winning the argument. The same rueful resignation played across Jack's face then his eyes brightened with an idea. "What about Thor?" he suggested.

"No," Daniel said. "We can't risk it, Jack. The System Lords are just looking for a chance to break the Protected Planets Treaty."

"He's right," Sam whispered to her husband taking his hand in hers.

Jack sighed as he took Sam's arm turning her to face him. "Be careful," he admonished before kissing her lightly on the forehead. His expression hardened as he turned to Clark. He didn't say anything to the other man, but his eyes conveyed a message all the same.

Clark nodded his acceptance of the unvoiced edict. He turned and lead the way out of the building as a human shield in front of his captor. "What's a Goa'uld?" he asked with all his instincts screaming at him to get as much information as he could.

"It would take too long to explain everything, and you probably wouldn't believe me anyway," she told him.

"Give me the Cliff Notes version," John demanded. "I don't like going into things blind."

"You noticed how the President addressed my father?" she asked.

"General Carter and Selmak of the Tok'ra," John murmured.

"Four years ago my father was dying of cancer," Sam told him as she followed him towards where the President and several others stood waiting for the occupants of the SUV. "Selmak is an alien being that lives inside him. Selmak cured his cancer, and in exchange they share my father's body."

"And Selmak is a Goa'uld?" John guessed. He was willing to take the 'alien' part on faith considering the level of technology they'd shown already and the strange sound of General Carter's voice when he'd spoken to Tony Brentano.

"A Tok'ra," Sam corrected. "Same species. Different faction. The Tok'ra are symbiotes. They share the body with the host. The Goa'uld are parasites. They subhume the host totally. The Tok'ra have been in rebellion against the Goa'uld for several thousand years. The Goa'uld have enslaved humanity across the galaxy including here on Earth until a rebellion in ancient Egypt forced them to withdraw from the planet."

"How will I be able to tell it's a Goa'uld?" Clark demanded.

"You won't," she told him. "I was taken as a host a few years ago. It died inside me a few days later, but since then I've been able to sense when a Goa'uld or Tok'ra are nearby." Even though Clark couldn't see her face, he could feel the underlying horror in her voice.

Clark was still mulling over her explanation when she grabbed the back of his shirt tugging him to a halt. "What?" he asked.

"It's a Goa'uld," she whispered.

He looked at the two men who had exited the vehicle. They were perhaps fifty yards away. The driver was dressed as an Air Force colonel. The passenger was an older man in his sixties or early seventies. "Which one?" Clark asked.

"The older man," Sam told him. He sensed her kneel down behind him then felt the tug of the knife on the ties that bound his hands at his back. "Dr. Alexandro Rivera. We have another problem though. The other man is Colonel Nick Rivers. He's spent the last three weeks prosecuting Jack and I for fraternization. He's going to recognize me."

"Is it just me or is there a family resemblance?" Clark suggested sotto voiced as he rubbed the raw skin at his wrists.