Neil Grant

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

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.

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.

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.