"The Son" is not an easy watch.
That's not the problem.
The second film directed by writer Florian Zeller, it is, like the first — 2020's stunningly effective and affecting "The Father" — an adaptation of one of his own plays and co-written with Christopher Hampton ("Atonement"). (They are part of a trilogy of plays addressing mental health, the other being "The Mother," which has yet to be adapted for the screen.)
