This was the very first and probably most
successful cartoon starring the easily scared and very good canine,
Scooby-Doo and the gang. The gang was Scooby, his best friend
Shaggy (voiced by Casey Kasem), Fred/ Freddy, Velma and Daphne.
Mysteries were very popular in the 70s, but this team of investigators
was probably the most famous Hanna-Barbera creation. Every episode
was nearly the same. They basically turn up somewhere and hear
of a disturbance from something, e.g. monster, ghosts, and they
investigate. They get chased by this thing until they eventually
catch it. It's always a person in a mask though, most likely the
most obvious person they met earlier. But who cares, the thing
was always different and kids loved Scooby.