The Man Who Knew Infinity (2015) BBC Two, 11.15pm ★★★★

Dev Patel brings surprising interest to the story of star mathematician Srinivasa Ramanujan, whose number theory research in the early 20th century took academe by storm. Self-taught but unemployed in Madras, he reached out, via civil engineer Sir Francis Spring (Stephen Fry), to Cambridge theorist GH Hardy (Jeremy Irons). It’s an overdue look at a true story of triumph over adversity.