Jack was awoken to the sound of a plane flying overhead. He swore as he sat up to watch the plane. He hadn't meant to fall asleep and he needed to get moving again. He waited until the plane was gone, using it to orientate himself before standing. He put Carys into her pouch on his chest making sure she was secure. She cried against him looking for her meal and Jack sighed as he realized that was all he currently was to her. A source of nourishment and a heater as well as transportation to their next destination. He made sure she was able to feed then took the Doctor's blanket in his hands. The Doctor groaned but otherwise didn't wake at the change of angle as Jack set off once again into the cold darkness. He was slightly worried about how long the Doctor was sleeping for but if he had a concussion, as Jack suspected, then it was better to let him rest.

"Jack." The Doctor's voice broke the silence beyond the sound of Jack's steps and the blanket being drug. There was also the occasional whimper from Carys but for the most part, she was quiet as long as she was kept fed and soothed.

"Yes, sweetheart?" Jack wondered he didn't receive an answer so he kept walking, assuming the Doctor was just talking in his sleep mostly numbing but he occasionally said Jack's name or whimpered the word no. He was prone to night terrors and if they were in bed, Jack would have comforted him. Now, he just had to keep moving while listening to his fears. If they got too bad, Jack would stop but for now, they let him know the Time Lord was alive.

"Jack," the Doctor moaned. Jack ignored him as he concentrated on putting one foot in front of the other. "Jack, please I need a drink of water."

"Sorry, Doc, I didn't realize you were awake," Jack responded as he stopped walking. He carefully lowered the blanket to the ground, then took off his backpack before kneeling down next to the Doctor. He pulled out one of the bottles opening it. The Doctor reached out with shaky hands gripping the bottle and bringing it to his mouth. He took a small drink followed by another as Jack kept one hand ready to grab it in case he lost his grip. When he finally lowered it, Jack reached for it ready to take it back.

"Mine," the Doctor whimpered holding on.

"I would let you keep it, but I don't want to lose one of our only bottles of water if you pass out again," Jack explained calmly. The Doctor lifted the bottle to look at it. It was just about half empty and he was so thirsty that he could have easily finished it as well as a second bottle. The only thing that stopped him was knowing he had to preserve the water long enough to get to the next village.

"I'll be careful," he promised. Jack smiled at him.

"I'm sure you will," Jack agreed. Reaching into the bag again, he found one of Carys's diapers. He tied part of it tightly around the bottle then tied it around the Doctor's wrist so he wouldn't lose it. He did a quick count of the remaining nappy's unhappy to find that he only had enough for three more days. They only had water for four days if they drank one bottle a day between them. The food would last slightly longer but without water, they would quickly dehydrate and his milk supply would go dry. With that knowledge, he knew that he had no choice but to start moving again and pray they reached another village in time. He put his pack back on then stood hefting the blanket up with him. The Doctor grunted at the change of position before going quiet again. Jack assumed that he passed out again so he was surprised when the Doctor spoke.

"I'm sorry," the Doctor whispered.

"You have nothing to apologize for, Doc. You lost a lot of blood and hit your head on the ground pretty hard. I haven't been able to check for a concussion but I would be very surprised if you didn't have one," Jack answered as he kept moving.

"I don't know. I have a headache and I can feel the blood loss. The combination with the poison is making me weak," the Doctor told him.

"You mean the infection?" Jack tried to clarify. The Doctor shook his head no even though Jack couldn't see it.

"I may have an infection as well but the knife that cut me had poison on it. It isn't enough to kill me but I am unable to detoxify and get the poison out of my system faster," the Doctor explained. Despite feeling horrible he still found himself thankful that he was the one who was cut by the blade and not Jack. If Jack had been cut Carys would have lost her food source because even if the poison didn't kill him they couldn't risk it getting into Jack's milk.

"What would you need to detoxify?" Jack wondered.

"I would need a ginger beer, protein, something salty, and a shock," the Doctor answered.

"Like an electric shock."

"That could work but it really just needs to be any kind of shock. The last time I was poisoned it was with cyanide and when I asked for a shock, Donna kissed me," the Doctor reminisced causing Jack to laugh. He could just imagine how big of a shock that was as the Doctor and Donna had been best friends with no romantic interest in each other. The Doctor tried not to speak of her but that didn't stop him from thinking or dreaming about her. They went quiet again as the Doctor rested and Jack concentrated on just trying to keep moving. As they walked, Carys woke and began to whimper. Jack sighed adjusting her so that she was able to feed. She quickly went quiet with the only sounds of her breathing as she ate hungrily.

"You know Doc, one thing I could put up with the swelling and the uncomfortableness that it causes but I really wish my nipples would stop chafing," Jack complained.

"Jack," the Doctor warned with his tone.

"What? You think she can understand what I'm saying. She is just happy to hear our voice and even if she could understand, she's been in a vagina more recently than I have," Jack commented. The Doctor sighed loudly and Jack found himself smiling again as he kept walking. They carried on with the same routine of rest and walking for what Jack judged to be two days based on the planes flying overhead and the loss of supplies. There was little talk between them as the Doctor could barely stay awake for long periods and Jack just concentrated on moving. Before the plane on the third day, a light appeared in the distance. It blended in with the faint stars at first before slowly getting brighter. Jack adjusted his path slightly to head towards it. As he walked he came to another outcropping of rocks and chose to rest for a while before they hopefully would come to the end of their long journey. He didn't sleep, though, as he just desperately wanted to find the beacon.

"I can walk this time," The Doctor told him as Jack once more stood to continue on his journey even if his body protested at this idea. His arm was a mass of burning pain still and he felt too hot despite the cool ground. He could have easily closed his eyes and slept again, but it wasn't fair to make Jack keep dragging him. He could make himself walk with Jack for a while.

"Are you sure?" Jack asked in concern. The Doctor nodded. Jack gave him a doubtful look but didn't argue. Instead, he leaned down and picked Carys up adjusting her in her sling once more. She stared up at him and Jack smiled at her happy to see that she was alert and thriving despite the long journey. With her secure, he helped the Doctor to his feet. The Doctor's legs almost gave out at being upright for the first time in days and Jack caught him. "Maybe this isn't the best idea."

"Please Jack, I can do it," the Doctor answered stubbornly. Jack could hear the determination in his voice and didn't have the heart to force him to lay back down. Instead, he supported him as once more they set off. Jack wasn't sure if they were moving slower this time as the Doctor leaned heavily against him as they walked at the slow pace. Jack supported him with one arm, not saying anything as they moved. He knew that the Doctor had to be in pain, but the Doctor didn't complain as he focused on walking with Jack. He didn't know where they were going, but he trusted Jack to keep them safe.