Per the title, Griffith Park is a large public park at the eastern end of the Santa Monica Mountains, Los Angeles, California and covers 4,210 acres.
Per the title, Robin Hood is a mythical figure in English folklore who was famous for robbing from the rich and giving to the poor and fighting the corruption of King John and the Sheriff of Nottingham.
Alan Reed Jr., is the actor who plays Buddy, the hippie. In a couple of episodes three years before he had played a beatnik named Sheldon.