Cynics may scoff at the fact that Infinitely Polar Bear glosses some of the filmmaker's darker memories, but they'll need an ice bucket handy if they intend to avoid its warmth altogether.

Ruffalo is generally wonderful at finding the tone and mood of a character and holding to it; here he has to bounce about, but again he latches onto a consistent energy that makes Cameron a singular life force.

"Infinitely Polar Bear" is a much-needed reminder that the realm of film is still a place to encounter something other than comic-book scenarios.

Forbes stays true to the heart and soul of her movie, and her connection to the subject matter shows itself in the pleasing end results.