Among the original
Apes movies, only this one had true time travel;
the others involved only
relativistic time dilation, which (as even
Dr. Milo knows) is technically not time travel. But in this one, Milo, Cornelius, and Zira
are blown back to the time of the original astronauts (given the violence of the explosion,
we’re going to call it a
time rift) and are persecuted in a 70s
made-for-TV manner.
— Michael Main