Disclaimer: I don't own Back to the Future, Back to the Future Part II, Back to the Future Part III, Back to the Future the Game, Back to the Future The Animated Series, Back to the Future the Ride... anything else semi-official? I suppose that's about it.

Author's Note: Welcome to the final part of the SmartMarty Trilogy. For those who haven't read the previous parts, it's a trilogy in which Marty and Doc, well, Emmett have their intelligence switched (naturally, not through some crazy experiment). As a result, Marty invents the time machine. This is Part III, and if you haven't read the previous parts or even seen the movie trilogy at all, check them out or else this won't make any sense. The earlier parts are 'Marty's Great Experiment' and 'Racing Through Time'. Anyway, have fun reading this chapter. And remember to review. That shiny link at the end saying 'Review this Chapter' isn't there to fill up space, you know. Well, it might be. But it's also there so you can use it.

Temporal Destiny In The West

1: Chapter One

Emmett looked at his watch as he tightened the rope around him. There was not much time anymore. Already, he could see Marty and the time truck approaching in the distance.

Mentally hoping for the best, he jumped off the ledge. The abrupt strange sensation of nothing being under his feet didn't last long as he fell downwards, narrowly hit the ground with his foot, was moved up and down for a few moments, and finally came to a rest a few feet from the ground. Relieved, he untied the rope from his body and let himself fall down the remaining feet to the ground.

Luckily, he didn't experience a hard fall. He landed foot-first on the ground, and immediately straightened himself. He ran over to the lamp post, once more checking everything as he arrived. According to the distance between Marty and the lamp post, it was just another five seconds or so before he would arrive, and according to his watch, it was three seconds to go before 10:04 P.M. It was about time.

Three seconds later, the clock tower's clock turned to 10:04 P.M. The next instant, lightning struck it in an epic moment no cinema could have reproduced – well, maybe they could in the future, but not now anyway – and electricity raced down the cables. Emmett managed to connect the two ends just in time but was blown back anyway by the enormous flash of light and sonic boom that resulted as the time truck hit the cables and it and Marty were transported back to the year 1985. The thirty-five-year-old didn't even notice that he had landed in some rather painful bushes near the street. He was too thrilled at the phenomenon he was watching to even feel a slight bit of pain.

As the winds from the temporal displacement cleared up, Emmett stood up and started running through the fire trails. He accelerated as he got further, and eventually, he even made a little dance. He felt a bit embarrassed for doing so – after all, he was a grown up man – but who could blame him for being enthusiastic in such a situation?

After finishing the dance, he began to walk back to the cables, grinning from ear to ear. As he did so, though, another thought popped into his mind. This event did, of course, mean that Marty was gone. There was no Marty around anymore to tell his stories about his horse dealing business anymore. His friend was gone, and he would have to wait thirteen years to catch up with him. And even then, it just wouldn't be the same until 1985.

Emmett shook his head. Well, no use thinking too much about it, he'd just drive himself crazy. And it wasn't like he would be all alone – he would have horses, after all. Sighing, he began to walk over to the cables to remove them.

Just then, he heard footsteps behind him. Ignoring the sound as somebody running through the street or his ears failing on him – after all, that sonic boom was loud enough to make anybody deaf – he continued his way to the cables. He stopped, however, when the person running up to him took his coat and turned him around.

Any annoyance he might have felt vanished as Emmett looked into the face of the person that had just turned him around. It was Marty – the same Marty who had just left. Emmett's mind locked up. "Argh!" he exclaimed. "A ghost!"

"No, wait, Emmett" Marty insisted. "It's just me, all right?"

"That's impossible!" Emmett exclaimed. "I just saw you go back to the future! It's impossible for you to be here!"

"I know you just saw me leave for the times that have yet to come," Marty said, "but I'm back… I'm back from the future!"

As that information caught up to the older man, Emmett felt seriously unstable on his feet – after all, it had been a long day for him, and this new information was too much to take. He wanted to say something, but before he could bring out the words, he collapsed, losing consciousness.

oooooooo

Marty was horrified as he saw Emmett go down. He figured he shouldn't have run up to his friend like that – he should have known the horse dealer-to-be would be shocked. But then again, that didn't mean that he had to faint like this! Stubborn, the teenager knelt down in front of his friend. "Emmett…" he began. "Come on, Emmett, wake up…"

But even as he did so, Marty began to get the faint but rapidly growing feeling that his friend would not wake up, not tonight. He'd have to wait… wait before the final adventure could begin…

"Marty! What are you doing here!"

The teenager jumped up, surprised. Had he just heard his mother's voice… in 1955? Indeed, as he looked in the direction of the sound, he could see his mother. However, it was his mother of the year 1955, not the one of 1985, and she was accompanied by his father. "Lorraine, George" he replied. "I could ask the same thing to you two."

"We came up here to watch the lightning strike the clock tower, as you had told us" Lorraine said, keeping an eye on an excited George.

"It was incredible!" Marty's father exclaimed. "It's one of the most amazing things I've ever seen in my life!" To his surprise, the teenaged scientist noticed that his father was now not so shy anymore, or at least not like he was before. Whether that was because of him punching Biff out or he was still excited about the lightning, the teen inventor didn't really know.

"As you can probably see looking at George, we liked watching it" Lorraine said. "That's why we went here. We saw you depart… and now you're here again." She looked down at Emmett's unconscious body, then up to Marty. "I can't blame Mr. Brown for being surprised. What are you doing here?"

Marty sighed. "Listen, I'd love to tell you…"

"Go ahead."

The teen frowned at his mother's bluntness. "…but I have more pressing matters to concern myself with. Most importantly, the fact that Emmett is still unconscious, which is highly inconvenient. I need his help in having a place to stay the next few days."

"You could stay at our house" George offered. "I don't think Mom would mind, and Dad…" he shrugged. "Well, knowing Dad, he won't complain much either."

Marty smirked, knowing all too well how his grandfather could shy away from actually confronting someone. Even in the new timeline, with his son being more successful, Arthur hadn't quite lost that. He had improved a bit with regards to confidence, but he had never gone as far as his son did. Perhaps it was really too hard to change one's character after a certain age… which would mean that Marty had probably made his inadvertent changes to George at just the right time.

"That's really nice of you to offer, George" he replied. "I'd take it up, too, but the time vehicle needs a place to stay. Not that I don't trust your parents, who are, after all, also my grandparents, but Emmett's house is much more remote and doesn't require telling more people about my secret. Thus, Emmett's mansion would be the best place for me to stay… if I can wake him up, that is." The teen tried to slap his friend's face, softly, hoping that would make him come to. Didn't work.

"I suppose it would" Lorraine replied. "But, as I said before, why are you here? You can at least give us some answer." She looked down to Emmett, who was still completely out of it. "I don't think Mr. Brown is going to come to any time soon."

Marty frowned. "Don't have that little faith in my capacities regarding waking an unconscious person" he said, stubborn as ever. "I'm sure that he will come into consciousness within a limited amount of time, and then…" He stopped abruptly, as a drop of water hit his shoulder. Looking up, he found that the sky was very dark. "Oh, perfect."

The perfection of it was shown a moment later when the next few drops began to pour down out of the sky. The amount of drops increased rapidly, and within thirty seconds, it was pouring. Lorraine shrieked and ran to the side of the street to hide under a shelter. George followed her an instant later. Marty, however, stubbornly remained in the centre of the street, ignoring the rain soaking the letter and the sports book he still had on him. Instead, he looked down to Emmett's face, which was getting wetter with the second. "Emmett, please…" he muttered. "Wake up."

It didn't help. Even with water streaming all over his face, Emmett remained stubbornly unconscious. Marty sighed. "I guess I'm going to have to take him home."

Take him home. It wasn't a very pleasant foresight, but Marty knew that he didn't want to wait any moment longer than necessary in the pouring rain out here. Plus, Emmett wasn't going to wake up soon. Marty could see that now. It would probably take a few more hours. Hours he did not want to wait on the street. He might catch a cold out here.

Marty stood up and ran over to his parents, leaning against the wall next to them. "I'm not sure whether I should ask this or not," he said, "but could you two help me with transporting Emmett back home? I can take his car, but it's still a matter of getting him there first. Considering the car is quite a distance away…" He shrugged. "I suppose I can't do it alone."

"We'll help" George said. "If you hadn't asked, we would've done it anyway." Lorraine nodded, and the two of them walked over to Emmett. Marty reached into Emmett's pockets and, after a few seconds, retrieved the car keys. He handed them to Lorraine who went off to open the passenger door of the car.

It was now up to George and Marty to do the harder task: transporting Emmett over. Which, considering the horse dealer-to-be's weight, wasn't that easy. After a few minutes of struggling, however, they managed to get it done. With Lorraine's aid, Emmett was put inside and left on the passenger's seat. Emmett immediately slumped forwards and was left in a slightly uncomfortable position. Marty got in and sat down on the driver's seat, but was unpleasantly surprised to see Lorraine and George following him, entering through the passenger doors in the back.

"What are you two doing?" Marty asked, surprised.

"Simple" Lorraine said. "You required our help for getting Mr. Brown in, so I suppose you also require our help for getting him back out and into the mansion."

Marty frowned. "The walk from the car to the mansion is shorter" he said. "I could manage that."

"You could, but you don't have to" his mother said on a tone that told him she wouldn't like him arguing with it. "We have nothing else to do and we're willing to assist you in it, so why turn down our offer for help?"

"Yeah" George chimed in. "No offence, but you would exhaust yourself even more if you did it alone. Plus, you still have to tell us what you are doing back in 1955 again after we just saw you leave."

Marty smirked. "I'm not going to win this fight, am I?" he said. "Fine, you can come with me."

The ride to the mansion was kind of quiet. Marty had to keep his eyes on the road and on Emmett, George was still awed by the fact that he had punched Biff out and had just seen the most amazing thing he'd ever imagined seeing, and Lorraine knew better than to disturb either of them. After roughly a quarter, they pulled up to the Brown mansion.

Marty grimaced as he opened the door. "I should have figured from the noise that the rain hadn't ceased, but I figured I could have some hope at least it had decreased in intensity" he muttered. "Oh, Great Scott."

"Is it still as horrible?" George asked.

"More like worse" his son replied. "The rain is definitely gushing down on us now. It's like the supply of a month is coming down… did you have a lot of rain this month?"

"Not in Hill Valley" Lorraine said. "It's been relatively dry all around the past weeks in here. It was worse in Sacramento, where Dad went around Halloween to pick up some things for his work, but here…" She frowned. "Do you think there's a connection?"

Marty shrugged. "There might be one, there might not be. Anyway, we have more important things to worry about." He opened the passenger door, allowing Lorraine to get out, and handed her the keys again. George had already exited, and together the boys moved over to Emmett to carry him out of the car and into the mansion.

Despite nearly slipping on the wet steps in front of the door, Marty, George and Emmett made it through this minor adventure alive and well and got inside (once they had found the keys in Emmett's left pocket, after searching on every other possible place). Marty guided them over to the living room, where they put Emmett down on the couch. Within a few seconds after the thirty-five-year-old was in position, Marty went over to his face and gave it a soft slap again. It was no avail, though, as Emmett didn't wake up.

"Definitely unconscious" George said. "I don't think he's going to wake up within the next few hours."

Marty winced. Though he had thought the same a short time ago, hearing it from a second source only hammered the message home. "I suppose you are correct" he muttered, sighing and sitting down on one of the chairs. "I'll have to wait some time for him to wake up."

"If it's going to take a while, you'd better get him into a more comfortable position" Lorraine said. "I'm not sure whether he notices anything of it right now, but I am certain I wouldn't like being asleep in a position like that. He still has wet clothes and everything on."

"You're absolutely correct." Marty got up, and he and George carefully removed Emmett's jacket, shoes and socks. Lorraine returned with a blanket and a towel. After trying to dry Emmett's pants with the latter (which didn't work so well, so Marty went over to fetch the hair dryer from the place his friend had put his future possessions, causing George and Lorraine to freak out a little until he explained that it was really innocent), they put the blanket over the poor horse dealer-to-be and sat down in their own chairs again.

Marty didn't get any rest, though. He had barely touched the chair, when Lorraine once again asked the question she'd been waiting to ask ever since he had showed up at the Courthouse Square after his younger self had been sent back:

"What are you doing here?"