At an exclusive military academy on Sabre Island, rich young delinquents think money puts them above the law. Enter Steve Conway - there to investigate the death of his son, who he had been told died in an accident.

Frank and Joe Hardy are the sons of Fenton Hardy, a famous private detective. Finding everyday life at home in Bayport dull, the boys hope their father will let them work on one of his cases. Disappointed when he tells them his work is too dangerous for children, they are more determined than ever to follow in their dad's footsteps, and solve mysteries.

When an opportunity comes to help prove the new kid in town as innocent and find the long lost Applegate treasure, they jump on it. We follow the boys' case as they discover new twists and turns in the new case and in the mystery of the 10 year missing treasure.

A neighborhood rock band gets a job playing at a summer camp.

Chip is killed accidentally while trying to rape a blonde girl, who runs. Silver becomes the number one suspect even though she has an alibi, but due to previous brushes with the law she's sent to Girls Town, a home for young women in trouble with the law which is run by nuns. Silver is rebellious and causes trouble at the school, and her friend Sarafina totters near the brink of self-destruction because of an infatuation with a young singer. Meanwhile Chip's father hires a detective to find out the truth, and Chip's friend Fred gets Silver's sister in trouble at a drag race. Silver has a lot of problems all right.

Prior to the Normandy landings three replacements are assigned to the 1st Platoon, "D" Company, 502nd Parachute Infantry Regiment. Amongst them is Private Mason (Tom Tryon) who doesn't get along with his fellow paratroopers but is kept in the unit by his platoon commander Lt. Pauling (Jan Merlin). Soon after the drop, Lt. Pauling is blinded and Mason learns how to be a paratrooper when he takes care of his Lieutenant.

A group of beatniks unwittingly harbor a serial rapist. A cop goes after him after his wife is attacked.