Keane...

"Kerrigan's great, incrementally affecting movie, which was co-produced by Steven Soderbergh, presents this man as an unmoored soul, drifting in dampness and cold. In having lost his daughter, he appears to have lost a piece of his mind.
 He stands in traffic screaming the little girl's name, sleeps in the grass beside the highway, and bathes in a public bathroom. Living is a state of psychological fragility… …
There is no villain to slay. There is no certain outcome. Nothing is stable. And as much as it kills Keane -- a handsome, if weary-looking redhead in his mid-30s -- life must go on… …Lewis is British, and his work here is rigorous and smart, particularly with Breslin, who has an uncommonly natural presence

Lewis's character is probably schizophrenic, but Lewis makes Keane's struggle against the disorder moving.”

Boston Globe

source damian-lewis.com

 “While a less adept performer would have played the protagonist as a madman, Lewis instead brings gravitas to a despairing human being. Throughout the film, he provides an edge of normality and reason to the character, the sense that not too deep down is his old self, a reasonably acting personality, presenting hope of recovery. Of course, this makes his crazy episodes all the more hard to watch, as we watch a sympathetic person tearing themselves down in front of strangers, seemingly oblivious to his own actions, utterly lost in self destruction and self torture… …Lewis transforms William Keane into a real person, one you wish to console, to talk down from the metaphorical ledge.”

source damian-lewis.com