Watch Free Online HD Moviesjoy. 25 years ago five suburban kids stumbled on a murder in their sleepy hometown and led police to the killer. Two years later The Cassidy Kids Mysteries, a Saturday morning TV show based on their story, made its premiere. A terrifying real-life story became a brightly-lit colorful world of adventure. Now, in preparation for the shows DVD release, a documentary team has invited all five of the real Cassidy Kids back home to talk about how it all began.