Maurice Evans , in the original , played Dr. Zaius .

"Planet of the Apes" (1968). The original.

"Beneath the Planet of the Apes" (1970). Brent crashes on the planet and searches for Taylor. He discovers humans living underneath New York City (Forbidden Zone).

"Escape from the Planet of the Apes" (1971). Cornelius, Zira and Milo repair Taylor's ship and travel back in time to 20th century Earth.

"Conquest of the Planet of the Apes" (1972). The son of Cornelius and Zira is Caesar. After dogs and cats die off in a plague, apes replace them. Caesar leads an Ape revolution.

"Battle for the Planet of the Apes" (1973). Years after conquering Earth, Caesar wants apes and humans to live in peace. Others disagree.

"Cornelia" was named in tribute to Cornelius, played by Roddy McDowall in the original 1968/1970 Version of Planet of the Apes (Cornelia was also the name of wife of Gaius Julius Ceasar). The movie Rise of the Apes insinuated a romance between Ceasar and Cornelia, I guess they were trying to explain the ancestry of Cornelius?

"Planet of the Apes" (1968)

"Beneath the Planet of the Apes" (1970)

"Escape from the Planet of the Apes" (1971)

"Conquest of the Planet of the Apes: (1972)

"Battle for the Planet of the Apes" (1973)

"Planet of the Apes" (2001)

"Rise of the Planet of the Apes" (2011)

Roddy Mcdowell