They’re 10 of the original TV episodes edited into 5 TV movies, with opening and closing segments narrated by Roddy McDowall as the main character Galen, recounting on his adventures. Sadly I’ve not come across any episodes either 😞 to watch / share.
There’s also further info here from my original preservation query
https://originaltrilogy.com/topic/Help-looking-for-Planet-Of-The-Apes-TV-movies/id/73742/page/1#1333465
Thanks