The Review: Asa Butterfield comes of age as an autistic boy, competing in the International Mathematical Olympiad while grieving for his father and discovering feelings for a fellow contestant. The ever-watchable Sally Hawkins is excellent too, struggling to break into her son's mind, and the relationship between the two is beautifully played, as is the involvement of the teacher (Rafe Spall).
When dealing with this subject matter, there's so much potential for sickly sentimentality and it’s refreshingly avoided here with an ending which is satisfying but not explicitly happily-ever-after. It's a lovely watch; tender, funny, as achingly sad as it is uplifting.
The Verdict: x + y = a charming coming of age film with a difference