Short answers, pulled from the story.
Boris Podolsky was a Russian-American theoretical physicist who lived from 1896 to 1966. He is known for co-authoring the EPR paradox paper in 1935 with Albert Einstein and Nathan Rosen. He also collaborated with Paul Dirac and Vladimir Fock on a seminal early paper on quantum electrodynamics in 1932.
Podolsky, alongside Albert Einstein and Nathan Rosen, conceived the EPR paper on entangled wave functions, published in 1935. The paper stimulated a debate about the interpretation of quantum mechanics. Bell's theorem and the field of quantum information theory both trace part of their origins to that paper.
A 2009 book by John Earl Haynes, Harvey Klehr, and Alexander Vassiliev identified Podolsky with a Soviet intelligence contact code-named QUANTUM. According to Venona cables, QUANTUM approached Soviet intelligence in 1942 and 1943 and was paid $300 for providing Graham's law of gaseous diffusion. The authors acknowledged the evidence was somewhat indirect, and the connection has never been conclusively established.
Einstein praised Podolsky in a letter dated the 10th of November, 1933, to Abraham Flexner, calling him "one of the most brilliant of the younger men" who had worked with Paul Dirac. In 1935, Einstein wrote in a recommendation letter that he estimated Podolsky's abilities "very highly" and described him as "an independent investigator of unquestionable talent."
Podolsky and Lev Landau sketched plans in 1933 for a textbook on electromagnetism, which Landau later developed with E. Lifshitz into The Classical Theory of Fields, published in 1951. Podolsky completed his own version with K. Kunz; their Fundamentals of Electrodynamics was published by Marcel Dekker Press in 1969, three years after Podolsky's death.
Gene Saks portrayed Boris Podolsky in the 1994 Hollywood film I.Q.