As with the film and the live-action series, Return to the Planet of the Apes involved a handful of astronauts from Earth who were hurtled into the future and found themselves stuck in a world populated by advanced apes and primitive humans. Over the course of the thirteen episodes the astronauts attempted to keep one step ahead of the apes while at the same time trying to make some sense of what had happened. Additionally, they did their best to safeguard the human population from the apes. Each episode was self-contained to an extent. The story threads did weave in and out, with characters and plots from earlier episodes popping up in later ones. In order for the series to make any sense, the episodes need to be viewed in order. The animated series does chronologically fit with the rest of the Apes universe. It borrows characters and elements from the movies, the TV series, and the original novels. General Urko is borrowed from the TV series. Along with Zaius, Zira, and Cornelius, Brent (renamed here as Ron Brent) and Nova are from the movie series. Krador and the Underdwellers in the animated series are loosely based on the mutants in Beneath the Planet of the Apes. As with the live action television series, the animated series was concluded before the resolution of the storyline, and we do not learn if the astronauts are able to return to their own time period.