On March 16, 1974, Roddy McDowall appeared on The Carol Burnett Show
in full ape makeup. A snippet of that appearance was included in the A&E
special Roddy McDowall: Hollywood's Best Friend, which first aired on
October 8, 1998. Using the links below, you can download an excerpt from that
special that details Roddy McDowall's involvement with the Planet of the Apes
series, including the snippet from The Carol Burnett Show. The clips are
in Windows Media format; my apologies to those of you who can't view that
format. To download the files, right-click on the links and choose "Save
link target as...." or the similar option.
Here's the full Roddy McDowall segment from The Carol Burnett Show.