Batman

The elements that made this series so good:

The casting of Batman/Bruce, the casting of Robin/Dick, the casting of The Joker, the casting of The Riddler, the casting of King Tut, the casting of The Penguin, composer Nelson Riddle, composer Billy May, the Irwin Allen sound effects, the flashy Batcave set, the Batmobile, the colourful narrator, and one element is too private to mention here.

This 120 episode series has so many related productions you must see as well: the 1949 Batman and Robin movie serial, the 1966 Batman movie, The Green Hornet TV series of 1966, the Shazam! TV series of 1974, the Superfriends cartoon, the YouTube satire videos, 2003's Back To The Batcave, 2016's Batman cartoon with West/Ward doing the voices, the 1966 Batman Facebook groups with rare behind-the-scene photos of the series, etc. It never ends. 1966 Batman will live forever!