Each person came up to Bucky individually to tell him about each stone and when and where to put it back in time. He stood close to the time machine Bruce was building, waiting for each person to show up with the stone.

The space stone:

Scott explained to Bucky, "We took this from the lobby of Stark Tower in New York City, 2012. You can't miss the building, it says STARK across the top...or it did at one point. Anyway, we gave Tony a heart attack so by the time you get there he should still be on the ground convulsing."

"Oh," Bucky said nervously.

"It's fine," he replied, "I mean, Tony's fine. Thor can fix him. So the tesseract, the blue cube thing, is in this briefcase, that's the space stone. You should just be able to kick it across the floor from a distance back towards Thor, Tony, and Loki without being seen, no problem."

Bucky asked, "Are you sure?"

"Yeah," Scott said.

The power stone:

Nebula held the sphere up for him and explained, "This is the power stone. Careful, if you actually touch the stone itself it'll incinerate you."

"Got it," Bucky replied as he took it from her.

"It's from Morag," she continued, "a planet in space. It's in the temple of the infinity stone, totally deserted. I left that Peter Quill guy knocked out not too far from the entrance. You can't miss it."

Bucky said, "Sounds easy enough."

She added, "The barrier it's being held in melts metal like it's plastic, so watch out."

"Understood," he said, lifting his new arm up to show her. The fist bumped their new vibrainium arms together. He added, "You knew the soul stone required a sacrifice...but you didn't say anything."

She shook her head, "You're wrong, I didn't know. I only knew my father killed my sister. I figured after he got what he wanted he killed her because she outlived her usefulness to him. I'm sorry. If I had known-"

"Someone else would have died instead of Steve," Bucky said quickly, "I think he would have preferred for it to end this way."

"I'm glad you didn't die," Nebula said, and smiled at him.

The time stone:

Bruce explained as he handed the stone to Bucky, "I took the time stone from the top floor of a building in New York City. I got the address here." He handed him a piece of paper.

"Anything else I should know?" Bucky asked.

"Doctor Strange isn't the one holding the stone in 2012," he continued, "some bald woman is. I didn't get her name. She knows you're coming back to give it to her...or that someone is coming, anyway."

Bucky nodded, confused, but smiled anyway.

The mind stone:

Natasha gave Bucky the staff and explained, "This is the mind stone. I took it from Hydra in the elevator in the Stark tower in 2012 New York City but don't worry, you don't have to go anywhere near them. As I was walking away, Steve stopped me so I had to take him out. We started on the 14th floor balcony, but ended up on the 5th by the time the fight was over. He should still be out cold, you can just place it next to his unconscious body."

Bucky smiled and said, "That's nice."

"Are going to tell him about you?" she asked.

"If the soul stone doesn't get him back," he replied, "then yeah, I will. Even though he didn't know about me in 2012, I was still suffering under Hydra back then. Someone should know and do something about it."

Natasha said, "I think I'm supposed to dissuade you from doing that. I'm supposed to explain that you'll ruin that timeline's universe a bit if you mix it up at all, even over something so seemingly small. That would be the right thing for me to do in this situation, I think." She closed her eyes and made her lips disappear, trying to hold herself back.

Bucky asked, "What do you want to tell me?"

"This is the mind stone," she explained, "which I already told you but what you don't know is that it can manipulate someone's thoughts and feelings. If you do it right, you should be able to make him have a vision of whatever you want."

"How do I do that?" he asked.

She confessed, "I don't know, but Loki does."

The reality "stone":

"Of course you can put a vision into someone's head with this," Loki explained as he pointed to his old staff, "it's made to control someone's mind."

Bucky said, "I don't want to control anyone. I only want to put my memories into their head."

He explained, "You can contrentrate on what you want them to hear and see, then you place the tip on their chest and they'll see, hear, and feel whatever you want them to and it's impossible to resist. It's simple, anyone could do it."

"Thank you," Bucky said as he looked down at the staff, knowing exactly the right memories he wanted to use.

Loki handed Bucky the suringe and explained, "This is the reality stone in liquid form. When I went to Asgard my mother saw through my disguise. She'll inject Jane with this again so everything can go exactly the same way it did in 2013."

"Will she be freaked out about this?" Bucky asked.

"No she was raised by witches so she knows you're coming," he replied, "expect her to be like Thor when you arrive." He looked over at Thor teaching Groot how to do a handshake.

As Bruce readied the time machine in the forest, Sam talked to Bucky off to the side.

"Are you going to stay back there in 1940 whatever?" Sam asked.

"No," he answered, "but I have a note to hand out. It's to my parents, for after I 'die' back then. I'm sure they were devastated." He kept it folded up perfectly in his hand.

"You can keep that to yourself," Sam said.

"Thanks," Bucky replied.

As Bucky stood on the time machine, Bruce asked, "You remember which ones are which and when they're going back?"

"Yes," he said as he looked down at the brief case and staff in his hands, "the power stone is in the sphere, the reality liquid is in the neetle, the soul stone is red, the cube thing is the space stone, the green one is the time stone, and the mind stone is in this staff. I remember."

Sam asked, "How long will this take?"

Bruce replied, "For him? As long as he needs. For us it'll be about 5 seconds. Ready?"

Bucky nodded as Bruce fired up the machine.

First, he showed up in front of Frigga on Asgard in 2013. Startled, she stepped back when Bucky suddenly appeared.

"Loki said it would only be a moment," she said, "did everything go well?"

"Yes," Bucky replied unconvincingly as he handed her the reality liquid, "we won." He smiled at her as best as he could, not wanting to burdan her with everything that happened. "I have to go."

"Good luck returning the rest of them," she said, waving at him as he disappeared to the next timeline.

Bucky appeared in front of the temple of the power stone where Peter Quill's unconcious body laid in front of him. He nudged him carefully with his foot, hoping he wasn't dead, and Peter groaned, still knocked out.

He moved on toward the temple. The doors were still wide open. The shield protecting it's center was up. Bucky poked at it with his metal arm and sparks flew.

He carefully grabbed the sphere and pushed it through the shield. The heat on his arm grew but because of the vibrainium it merely turned red from the head rather than begin to melt or incinerate through the barrier. When he took his arm out the sphere bounced to the center and floated to the place it was before. He quickly moved on to the next stone.

On top of the mountain of Vormier, Bucky appeared next to Red Skull.

"Welcome back," Red Skull said in his usual tone of voice, "the idea that you can bring him back by returning the soul stone is a fatal one. All sacrifices are final."

Bucky took the soul stone out of the briefcase as he glared at Red Skull. "Why?" he asked, "I brought the soul stone back, a soul for a soul, like you said before."

"No one can come back from the dead," Red Skull replied.

Bucky took the stone and chucked it as hard as he could over the cliff. He waited. He wanted Steve to come back and ask what took him so long or where he had been or if they won against Thanos, but nothing happened, just as Red Skull said it wouldn't.

"Dont!" Bucky demanded, "Say anything to me." He teleported away.

On the Ancient One's roof, he came face to face with the Ancient One herself.

"Thank you," she said as she took the time stone from him, "I trust everything went well."

"We won," Bucky replied.

"Why do you look so disappointed?" she asked.

"Because people died," he answered. He teleported out of there to across town inside of Stark Tower to avoid the rest of that coversation.

He looked at the stairwell entrance that said he was on the 5th floor, just as Natasha told him where they had ended up. He looked down the hallway under the stories of glass windows and countless other glass hallways and staircases above him. Directly in front of him was broken glass, and Steve's unconcious body laying on the ground.

Bucky walked up to him with the staff in his hand and placed it in the center of his chest. He felt the engery move through the staff as he remembered his past.

He fell from the train, screaming the whole way down. He landed in the icy cold river in the mountain range and was found by Hydra agents later. Dr. Zola showed up and told him he was ready to be prepped. The next thing he knew he was waking up on an operating table, being told he was the new fist of hydra. He tried to strangle the doctor with his new metal left arm, only to get knocked out again.

He was awaken with electrocution. Bucky fast forwarded through decades of training, pain, enhancements, beatings, murders, and flashed forward to Alexander Pierce sitting in front of him and telling him his different missions over the years. He made sure Rumlow and the other Hydra agents were shown and to show the exact location in Siberia he was in 2012. He made sure to piece together exactly how Steve could enter the building and where he'd find him.

When Bucky took the staff off of Steve, he left it at his side and ran away in time to hear Steve jump up and shout in horror, "Bucky!" He caught his breath and looked around, but Bucky was already hidden behind a wall. "Oh my God..." Steve whispered to himself and grabbed the staff.

Hoping for the best for Steve, Bucky made his way downstairs to the lobby in order to deliver the last stone. When he came out of the stairway, he saw what was described to him. Tony was on the ground, with Thor panicking over him and Loki standing off to the side. He froze when his eyes moved onto Alexander Pierce, who was also standing over Tony.

Panicking, he dropped the briefcase and had to actively keep himself from hyperventilating. He didn't notice it had popped every-so-slightly open. After he took a moment to pull himself back together, he kicked the briefcase across the floor and it bounced off of Thor's foot and burst open.

The tesseract flew out and landed at Loki's feet. He nonchalantly picked it up and disappeared into blue and grey smoke.

Bucky gasped in fear. No one mentioned to him that would happen. He knew he had to leave before anyone noticed him so he quickly went back into the stairwell and teleported away.

He stopped by his old house in Brooklyn, New York in 1941, the morning his parents met him on the ride to the airport. He stayed in the alleyway as he watched his parents and then his younger self walk out the front door and locked it behind themselves before walking to the car.

Once they were gone, Bucky left the alley and entered the house by easily picking the lock. He snuck into his childhood bedroom and left the note in a drawr right on top. He closed it carefully and went to the future indefinetly.

When Bucky came back to the present, he was still in shock.

"Did everything go as planned?" Sam asked nervously, "You don't look too good."

Bucky explained nervously, "When I returned the cube thing Loki grabbed it and then turned into smoke and vanished."

Bruce asked, "I'm sorry, what? He did what?"

"Was that supposed to happen?" Bucky asked carefully, "Did that happen before?"

"No," Bruce explained, "that did not happen before. When all of that went down, Thor took the tesseract and Loki back to Asgard after we had lunch together in the city. What do you mean he vanished?"

Sam asked, "Is this bad?"

"Well according to what he just told us there's now a 2012 evil Loki wandering around in that timeline somewhere," Bruce said, "but it's not in this timeline so I don't think it effects us."

Bucky asked, "So everything went okay?"

"Yeah it sounds good to me," Sam replied.

Bruce said nervously, "I still don't think it's okay. Why did you let that happen? What went wrong?"

"I got distracted," Bucky confessed as he came off of the time machine.

Sam asked jokingly, "By what, Steve's ass in that uniform?"

"No," Bucky answered seriously, "I was distracted by Alexander Pierce, the man that happened to torture and abuse me for decades was standing over Tony as he convulsed on the ground."

Bruce replied, "I don't remember seeing him being there."

"You weren't there," Bucky said, "you were outside rampaging and scaring everyone." Bruce put his head in his hands out of embarrassment.

Sam said, "I'd say we're all good then. We're fine here. Our job is done."

"You didn't do anything," Bucky snarked.

"You take that back right the fuck now!" Sam demanded, smiling at him. Bucky smiled back and they both ended up laughing.