maybe Zira and Cornelius did time travel

The "Planet of the Apes" movies were favorites of mine when I was a kid. I even liked the lame TV series that was based on the films. I still remember when my friend Brian Kirk got his parents to drive us to an all day "Planet of the Apes" marathon at a theater somewhere around Larchmont or Mamaroneck. It cost me 75 cents for a youth ticket to see all five Apes movies. That's only 15 cents per movie! I was flipping around the dial tonight and saw that the original "Planet of the Apes" was on TV. But why is it on the History Channel? Did I miss a lesson somewhere along the way?