- Fridge Logic: The humans learn that in the future, apes will talk and treat humans like animals. So they want to prevent Cornelius and Zira from having descendants as their descendants would probably be talking apes. They fail. But does this mean that Cornelius and Zira are their own ancestors?
- No, because the origin story they told (of an ape slave who one day said to humans what had been said to him a thousand times over - "no") is different from what came to be after they traveled back in time - their son Milo/Caesar became the savior of the apes instead.
- Probably not. Other chimps evolve by the time of the next film, after all.
- And their son, Milo who becomes Caesar in that next film loses his son by the time of the fifth and final Ape movie. It doesn't say he and his wife had more children.
- On another point, it strains credibility (to say the least) that Dr. Milo would be able to raise Taylor's ship from the lakebed, refit its blown hatches and get it working again, just in time to escape the Earth's destruction. Of course, without that rather huge implausibility there'd be no movie, so...
- Jerkass Woobie: Similar to his later counterpart Colonel McCullough, the comics painted Dr. Hasslein in this light, as he realized the ape-ruled future was his fault. He created the space-drive for the mission led by Taylor in hopes of a better future, but it has created a Predestination Paradox which caused the end of human civilization, the rise of the apes, and the destruction of the world. He took it upon himself to prevent the dark future he caused, by killing Zira's baby and the apes themselves to prevent them from having another child. However, his efforts were ultimately in vain.
- Science Marches On: "Grape Juice Plus" (wine) was said to be an excellent restorative, especially in the case of pregnancy. When the movie was made the dangers of alcohol consumption during pregnancy weren't widely understood. note
- Special Effect Failure: Milo repeatedly saying "Mama!" at the end of Escape is very obviously a short clip of a chimpanzee being played forwards and backwards repeatedly, and can serve as a source of Narm for an otherwise tragic scene.
- Surprisingly Improved Sequel: Compared to the divisived and at times reviled Beneath the Planet of the Apes, it's held in much better regard.
- Tear Jerker:
- Cornelius and Zira's deaths. The most likeable, human characters in the entire series.
- After the scene blacks out, Milo is still calling for his mama.
- The Woobie: Cornelius and Zira, even the former thought after being prosecuted by the humans that Zira was treated like dirt by their antagonists.
YMMV / Escape from the Planet of the Apes