The Man Who Knew Infinity -- 5/10
It's hard to turn great mathematics into great drama; this film doesn't entirely fail but it found it hard to carry on.
Portrayals of Hardy, Ramanujan and Littlewood were decent; although, regrettably, the art and science of mathematics was portrayed once again as a deeply mystical activity, inaccessible to but a few, and replete with sudden leaps of inspiration ab nihilo. The time dilation effect of film made this worse: the savage speed; failure almost absent; straight line from insight, argument to proof; and so on. The field does boast some magnificent and computationally adept characters, but neither Hardy nor Ramanujan were that superhuman.
Ramanujan's early life in Madras and more human aspects of the film felt forced, brief and forgettable. And it's fair to say that the film doesn't really pick up until you get to the Trinity College scenes and onwards.
Overall: a nice leisurely watch.
Thankfully, good biographies do exist, just as with Turing and Nash's films.