I'm not a big fan of Atom Egoyan's movies, although Exotica (1994), The Sweet Hereafter (1997) and Chloe (2009) stood out.
However, Remember starring Christopher Plummer and Martin Landau — and who doesn't love those two, here for the first time together — may just put him into the directors' pantheon. I may be slow on the pick-up, but I never saw it (the climax) coming.