Spoiler alert! We're discussing important plot points and the ending of “Kingdom of the Planet of the Apes” (in theaters now), so swing to another treetop if you haven’t seen it yet.

In theaters May 10. Fifty-five years, 10 films and two TV shows later, “Planet of the Apes” is, somehow, still as breathtaking as the first time we met Cornelius and Zira. The fantastic ...