Cookie Monster: Herbert Birdsfoot invents a complicated machine, to test Cookie Monster's problem-solving abilities. Cookie Monster needs to pull the string to raise the glass cover off the plateful of cookies at the other end -- but when he lets go to retrieve the cookies, the cover will fall again. Herbert hears Cookie Monster approaching, and hides to observe him. Cookie investigates the machine for a moment, then gets the cookies by karate-chopping the glass cover. (First: Episode 0132)
Oscar learns a few "grouch" words in sign language.