Doctor Stephen Vincent Strange M.D., Ph.D is the Sorcerer Supreme and a Master of the Mystic Arts.
Originally a brilliant, although arrogant, neurosurgeon, Strange got into a car accident which resulted with his hands becoming crippled. When all Western medicine failed him, Strange embarked on a journey that led him into Kamar-Taj where Strange had made the discovery of magic and alternate dimensions, being trained by the Ancient One.
Though focused on healing his hands and returning into his career, Strange learned more of the mystic arts and helped the Masters prevent Kaecilius from merging the Earth with the Dark Dimension, but not before witnessing the Ancient One's death.
Following the demise of their mentor, Strange became the protector of the New York Sanctum in New York as well as the Earth's protector from any new inter-dimensional threats.
From his new position, Strange had aided Thor in locating his father Odin.
When Thanos and the Black Order had attacked Earth, Strange and Wong were targeted as they held the Time Stone. Strange was soon abducted by Ebony Maw, who tried to take the Time Stone from him but failed when Strange was rescued by Iron Man and Spider-Man.
Strange later joined all his new allies, alongside the Guardians of the Galaxy, to battle Thanos in a desperate attempt to stop him. Secretly, however, Strange had already seen their only path to victory, as he then allowed Thanos to cause the Snap, killing Strange and trillions of others.
However, as Strange foresaw, Hulk had managed to resurrect the victims of the Snap, returning Strange and the others into life as they had continued their battles against Thanos, with an army of heroes, as Strange had witnessed Tony Stark sacrificing his life in order to finally destroy the Mad Titan once and for all.