Neil Grant

Hardie takes on counterfeiters who have created fake Wells Fargo checks.

An armed murderer conceals himself in a farmer's barn. The farmer enlists his neighbors in an attempt to capture the criminal without Highway Patrol help. Dan Mathews learns about the foolhardy plan, and charges in to save the farmers and capture the murderer.

A savage killer whale blockades a strip of coastline, capsizing boats and harassing skin divers and swimmers. Mike Nelson, armed with a shark-harpoon gun, engages the killer in a wild and desperate undersea battle.

A girl is placed in a straight jacket, securely locked in a trunk and cast to the bottom of the sea. It's all part of a carnival act - except she doesn't come up! Mike Nelson learns the secret of the act in time to save the girl from drowning.

When the State of Florida is plagued with a series of underwater crimes Mike Nelson is called to organize and train an underwater police force. Learning that a thief has just looted a cabin cruiser and escaped underwater, Mike gives his pupils a "practical" lesson. Mike uses his vast knowledge of the sea to trap the thief.

Slade's visit to an old friend turns deadly when some people will stop at nothing to steal a last will and testament entrusted to Slade's care.