Once Remember begins to unfold, the astonishment of watching an elderly man, who is losing his memory minute-by-minute, become a one-man Nazi hunter is intoxicating.

A strong supporting cast also does good work, and the film -- as is the case of all Egoyan's films -- is made with smooth professionalism. It's a pity that it increasingly strays into the direction of almost laughable improbability.

The performance by Plummer, now in his mid-80s, amounts to a masterclass on how to use one's actual physical limitations to advantage.

A film you won't soon forget.