[2] Dr. Zaius is an orangutan politician and member of the Ape National Assembly, as well as Minister of Science and Chief Defender of the Faith.

[4] For the film itself, Maurice Evans played the character, and he reprised his role in the first sequel, Beneath the Planet of the Apes (1970).

[6] In Boulle's 1963 novel, Dr. Zaius is antagonistic orangutan, appearing as an authority on simian science who believes talking humans are dangerous.

[8] In Planet of the Apes (1968), Zaius is an orangutan simultaneously appointed as Minister of Science and Chief Defender of the Faith.

In Taylor's dying moments, his hand accidentally falls on the bomb's triggering mechanism, causing it to activate and destroy Earth.