Bucky is an interesting part of Marvel history. He predates most characters in the MCU, created during World War II in Cap’s very first appearance by Joe Simon and Jack Kirby as a blatant Robin knockoff. When Captain America was thawed out and joined the Avengers, it was established that Bucky died in an explosion. It was mandated that Bucky would never come back. He was as permanently dead as Ben Parker and Gwen Stacy. Then, in the mid-00s, Ed Brubaker took on the writing duties on Captain America and decided to actually go through with bringing Bucky back into the fold. It shouldn’t have worked, but it did. As we’ll get to in a second, it even got its own film adaptation! So let’s go back in time and see the tragedy and triumph of James Buchanan Barnes. Steve took part in a science experiment that transformed him into the pinnacle of human health. Unfortunately, due to the scientist behind it being assassinated, Steve was the only super soldier. He was used as a tool for patriotic propaganda under the moniker Captain America, but when touring in Italy, he found out that Bucky and his unit were captured behind enemy lines. Captain America rescued Bucky and the rest, earning him a more hands-on role against the Nazis and the offshoot organization HYDRA. Cap led a squad tasked with taking down as many HYDRA bases as possible. One of their missions involved hijacking a train containing HYDRA scientist Arnim Zola. While the mission was a success, Bucky was knocked out of the train and fell to the water below, his fate all but sealed. Steve mourned his lost friend, but soldiered on. Captain America saved the world from the plans of the Red Skull, but in doing so, he ended up being frozen for decades. Thawing out in the present, he was disheartened to find that practically everyone he held dear was gone. But not everyone… Eventually, the mask came off and Steve realized the horrible truth: Bucky didn’t die in that fall during the war. Instead, HYDRA got their mitts on him, replaced his damaged arm with a metal one, and brainwashed him into becoming the ultimate killing machine. He would remain frozen for years at a time, only to be thawed out for special missions. To make matters worse, he had no memories of being Bucky or serving for the US. Still, the Winter Soldier understood that Captain America recognized him and that put some cracks in his conditioning. He was once again mindwiped to fight for HYDRA and seemed to be all-in on his mission. He and Cap fought on a SHIELD Helicarrier and the Winter Soldier even succeeded in shooting him. An emotionally weary Cap decided he was done fighting his friend, even though the assassin kept angrily punching him and egging him on. As the base exploded around them, Cap weakly told his nemesis that he would be with him, “’til the end of the line,” a quote from happier times in their past. Bucky’s wordless response was that of realization, confusion, and sadness. Steve’s body fell out of the Helicarrier and into the water below. Though still confused, Bucky knew enough to dive in and rescue this man who seemed to give a damn about him. He brought Steve to safety, then wandered off alone. Sometime later, Bucky visited a museum. At a display about Captain America’s World War II exploits, the confused assassin read about his own identity with a look of wide-eyed intensity. Elsewhere, Steve and his new friend Sam Wilson – The Falcon – were dedicated to tracking down Bucky and giving him the help he needed.

CAPTAIN AMERICA: CIVIL WAR

With only two people out looking for him, Bucky was able to keep to himself and stay hidden with little problem. Then Helmut Zemo – a man with a deep hatred for the Avengers – framed Bucky for an explosion at the United Nations. One of the casualties was Wakanda’s King T’Chaka, causing his son T’Challa to suit up as Black Panther so he could hunt Bucky down and unleash his vengeance. Zemo infiltrated Bucky’s cell and read off a series of secret words that would trigger him into once again becoming the brainwashed killer. The reborn Winter Soldier ran amuck through the facility, but was eventually taken down by Captain America and Falcon, who were able to escape with him. Held captive by the two heroes, Bucky was able to prove to Steve that he finally remembered their history together. He also explained that once upon a time, he was put in charge of training a small army of fellow Winter Soldiers who were being kept in stasis in Siberia. Due to the Sokovia Accords complications, Cap was stuck having to face those who were for government oversight and were therefore tasked with taking him in. A massive battle took place with one side featuring Captain America, Bucky, Falcon, Hawkeye, Wanda Maximoff, and Ant-Man while the other team was made up of Iron Man, War Machine, Black Widow, Black Panther, Vision, and Spider-Man. In the end, Cap and Bucky were able to escape, though their comrades were defeated and apprehended. Iron Man became aware of Zemo’s master plan and chose to work with Cap as an ally. The three prepared to face the Winter Soldiers, but found them all killed by Zemo. The true reason Zemo brought them together was to show them footage of a brainwashed Winter Soldier coldly murdering Iron Man’s parents Howard and Maria Stark in the name of HYDRA in the early 1990s. Overcome with rage, Iron Man tried to kill Bucky, only to be defeated by a protective Cap. At first, Bucky helped Cap spring the others free from prison, but he knew he was too much of a liability due to all the HYDRA programming in his brain. Until he was free of that threat, he needed to be kept on ice. Prince T’Challa, having accepted that Bucky wasn’t behind the death of his father, took him in and promised to help cleanse his mind.

BLACK PANTHER

In the post-credits scene, Bucky was shown having lived peacefully in Wakanda, given the nickname “White Wolf.” T’Challa’s sister Shuri found success in freeing Bucky’s mind, but said there was more for him to learn. Sadly, Bucky’s latest mission was a failure. Thanos was able to gather all six Infinity Stones and snapped his fingers. A confused Bucky fell over and turned into dust upon hitting the ground. 50% of the universe’s population was wiped out due to Thanos’ belief that was the wisest way to prevent overpopulation. Faced with the reality of this epic loss, Steve could only sit and say, “Oh God…”

AVENGERS: ENDGAME

At first, Thanos was able to destroy the Infinity Stones to prevent anyone from undoing his wish. Then the Avengers realized that they could gather the Stones via time travel and wish everyone back. Having succeeded, this soon led to Captain America, alone, staring down Thanos and his entire army. Luckily, he had plenty of allies after all. Portals opened all around and warriors from Wakanda, New Asgard, space, and so on stepped through. This included the resurrected Bucky. In the end, Iron Man gained access to the Infinity Stones and wiped out Thanos’ side with a snap of his fingers. Sadly, this move killed Iron Man. Bucky was seen showing his respects at Stark’s funeral. Shortly after, Captain America had to use the time machine to return all the Infinity Stones to their places and times of origin before they were snagged. He said his goodbye to Bucky, who seemed to have a good idea of what his old friend was up to. Sam Wilson found the elderly Steve waiting for him on a bench with a new shield in hand. Steve handed it off to Sam, christening him the new Captain America. Despite having his own issues with Sam, Bucky fully supported the decision. Now Bucky is in an interesting place. He’s cured of his brainwashing and can live his life, but what kind of life is there for a man like him? Especially since Steve is out of the picture. It looks like we’ll see this Friday with the first episode of The Falcon and the Winter Soldier.