Scooby Doo, Where Are You! is the first incarnation of the long-running Hanna-Barbera Saturday morning cartoon series, Scooby-Doo. Created by Joe Ruby and Ken Spears, it premiered on September 13, 1969 at 10:30 a.m. EST and ran for two seasons for a total of 25 episodes. Its final first-run episode aired in January 1971.

Nine episodes from Scooby-Doo’s 1976-78 seasons, first run on ABC, were originally broadcast with the 1969 Scooby Doo, Where Are You! opening and closing sequences. The entire 1976-78 series is sometimes marketed as third-fourth seasons of the original “Where Are You!” series.

Two homicide detectives try to find just the facts behind a mobster”s brutal murder.