Chris Evans shucks off Cap's cowl for Marc Webb's sweet but slight tale, playing a slacker battling his mother (Lindsay Duncan) for custody of Mckenna Grace's seven - year - old maths genius.
Those who enjoyed the resulting narrative voice should pick up The Curious Incident of the Dog in the Night - Time, which is told from the point of view of a 15 - year - old boy, Christopher, who is an autistic savant and a mathgenius.