- "You yourself once said that two things were infinite. The universe and human stupidity."
- "And you are living proof of the latter."
- —Martin Stein and Albert Einstein[src]
Professor Albert Einstein is a Nobel Prize-winning physicist, and the ex-husband of Mileva Maric. During a historical aberration of 1942-1947, the Einsteins were abducted by the Nazis for a plan of Adolf Hitler's to attack the United States (Earth One) with nuclear weaponry of his own. The aberration was eventually negated by the Legends after they approached the doctor, disguised as CIA, forcing him to inform the public and the US government of his spouse's name and her accomplishments, forcing the government to keep both Einsteins safe from the Germans.
According to Albert Einstein, without help from his first wife Mileva, he would continue working as a patent clerk in Vienna. At some time before 1942, Albert Einstein became a renowned scientist, an expert in Physics, moving to the United States (Earth One) from Germany. He's been married twice, with one marriage ending in divorce, and the other in death. Prior to the 1942 physics symposium, he worked on, but hasn't published his paper on unified field theory yet.
Albert Einstein attended a physics symposium in 1942, watched by the Legends and the Nazis, both of them disguised as party attendees. Albert was hitting on two ladies among the guests, trying to impress him with quotes from Isaac Newton. He then was approached by Martin Stein who tried to deter his behavior by reminding him of his wife though Einstein spat back which of the two he was referring to as one died and the other divorced him. As the Nazi agents realized that their cover was about to be blown, they opened fire at the guests, trying to either kidnap or kill Einstein. Martin prompted Albert to join them, but Einstein was unwilling to comply, so Martin punched him in the forehead and took him to the timeship.On board in the cell of the time ship, Albert woke up, with Martin and Mick waiting outside. As Rory and Stein tried to explain their reasons for taking hold of the scientist, Einstein appeared horrified and disbelieving of the possibility that Adolf Hitler would work to create nuclear weapons. However, he then realized that for them to be so sure of an imminent nuclear attack they had to have come from the future. Nevertheless, he decided to side with the Legends, informing them of another possibility for Hitler's plan: the Nazis could kidnap Mileva Maric, his ex-wife, and the only other person capable of creating an atomic bomb. Along with Einstein, the Legends eventually found Mileva's location, saving her from the clutches of Damien Darhk and the Nazis, but not before Darhk's escape aboard the U-boat, with a nuclear missile at hand.
Although the Einsteins were safe, the future refused to change. After being blasted by the nuclear missile from Darhk's U-boat, the Waverider's crew were time-scattered on emergency. By the time the team gathered back together, they decided for a change of plans regarding the Einsteins, traveling back to before the physics symposium. At that time, disguised as OSS, the Legends met the big guy himself, Albert Einstein, and convinced him to inform the public and the US government of his spouse's name and her accomplishments, forcing the government to keep both Einsteins safe. Albert happily obliged, recounting his exploits with Mileva at the symposium.
Albert Einstein, although regarded as some almost divine figure by Martin Stein, his personality was also down-to-earth, with a flirtatious side and great appreciation for common sense. Albert knew of his public image, trying to use Isaac Newton's quote as a pick-up line towards two ladies during the physics symposium, while later being irritated at Dr. Stein's fan-like attitude towards him, knowing about the works he hasn't published yet by 1942. Mick Rory affectionately called Albert "a pig" after the physicist tried to grope a lady's backside as part of his flirt tactic, before explaining his actions with a quote from Newton. 
When Dr. Stein interrupted Albert's flirtations and accused him of cheating with on his wife, Albert showed a remorseful side, lamenting his divorce with one wife, and the death of another. He also felt remorseful about the fate of Mileva Maric, who did not get the recognition she deserved in public, despite helping her husband greatly at the start of his path as a scientist back in Vienna. Despite their divorce, Albert was fond of Mileva, keeping their longtime collaboration in scientific studies, and was also very worried when he and the Legends found her apprehended by Darhk and the Nazis, asking the time-traveling vigilantes to save her. After the prompting from the Legends, disguised as CIA, he was very happy to tell the public of his ex-wife's role in his studies, changing history, with Martin Stein theorizing that "You're like one of the Einsteins" would become a catch-phrase in the future. 
Powers and abilities
- Bilingual: Albert was capable of fluently speaking English and German.
- Genius-level intellect: Albert is highly regarded as one of the world's greatest physicists throughout history, being an author of many works and theses on the subject of physics. However, as Albert admitted himself, he couldn't have started his career as a physicist without the support of his ex-wife Mileva Maric.
- Sharpened mind: Albert instantly figured out his kidnappers' identities as time travelers and was later able to deduce the Nazis' plan.
DC's Legends of Tomorrow
- "Fail-Safe" (mentioned)
Freedom Fighters: The Ray
- "Episode Three" (mentioned)
Behind the scenes
- In DC Comics, Albert Einstein appeared in a number of stories dealing with history and time travel, most notably Superman-related comics. Einstein was affiliated with the Manhattan Project, dedicated to providing the Unites States with nuclear weaponry.
- Albert Einstein was a real person, a German-American theoretical physicist and philosopher of science. He developed the general theory of relativity, one of the two pillars of modern physics (alongside quantum mechanics). He is best known for his mass–energy equivalence formula
E = mc². Einstein became an American citizen in 1940. On the eve of World War II, he endorsed a letter to President Franklin D. Roosevelt alerting him to the potential development of "extremely powerful bombs of a new type" and recommending that the U.S. begin similar research. This eventually led to what would become the Manhattan Project. Einstein supported defending the Allied forces, but largely denounced the idea of using the newly discovered nuclear fission as a weapon.