Among the Cape Ann community Jeff's pet dog is only popular with himself. The animal has gotten a reputation for stealing and the townsfolk want Jeff to get rid of him but he resists.
David and Jeff head to the port where the annual blessing of the fleet is to take place. But the number of people on the pier worries them so when they try to make it safe two men find vehement opposition.
After being dropped off on an island, the local ladies are enjoying their excursion. David and Jeff learn that an escaped convict is headed to where the women are, so they try to reach the area before the criminal does.
Captain Scott rescues young Billy Cameron after his boat blows up near the Scott Island channel. Billy convinces Scott a mine was involved and that ones remains in the water, needing to be found before more destruction or death.
Charlie Potter returns to his wife Jane after several years in prison but he unexpectedly brings an odd character with him. The man is found dead and Swift must find the murderer as rumors run rampant.
A freighter runs aground on a reef and the captain perishes. The crew, who abandoned the ship, blame a missing buoy which is where Captain Scott begins his investigation into the disaster.
A dangerous object is left carelessly on the dock and a young boy Bibber takes off with it. When the device is discovered missing a search is on for the lad before he's injured or killed.
An outbreak of encyphelitis occurs in the community and panic sets in among the community. Scott Island is rumored to have a vaccine they aren't sharing and Swift must move quickly to calm the hysteria.
Summer resident Michael Benson is not thrilled his daughter Barbara is spending time with local Danny. With the two youngsters disappear Michael and Cap'n Dan spend time arguing while David with Jeff organize a search.
Kay Wilson, a stranger to the area, charters Captain Swift's boat. But on their trip they encounter fugitive bank robbers which alters the situation. Swift must find a way to foil the criminals without injury or death.
An irascible older man is estranged from his grandson and just wants to be left alone. But David and Jeff think it is time for a reconciliation and hatch a plan to get the two men together.
An impending storm have the crew of a fishing boat worried but the captain refuses to alter his plans. The men are ready to take over the vessel rather than be caught in a hurricane and David must intervene.
Several engineers learns of a buried treasure and think they know where to look. When they take a break, two local boys Peter and Danny step in but they find unforeseen danger in their activities.
The township's manager is on a budget cutting crusade and decides the Lifesaving Brigade can do without any funds. David Scott makes the case of the importance of the long established community group.
A man presumed dead resurfaces and shakes up the town. On his supposed demise his business was sold and his wife remarried. No easy solution is known to satisfy anyone.
A friendly rivalry takes place between David and Professor Wheeler during the yearly fishing contest at Scott Island. But when the professor claims to have a device to give him the edge, Scott becomes concerned,
Captain Scott is asked to transport two men by boat. While heading to the destination Scott learns one of his passengers has committed an act of treason. He must help detain the wanted criminal.
When certain materials fail to detonate the radioactive waste is put in barrels and dumped near Scott Island. This concerns David and the citizenry so a plan is formulated for removal of the toxic material.
When an old friend of Scott's arrives David is glad to see him. But when the man starts flashing a large amount of cash around and offers no explanation of how he got it, Captain Scott becomes suspicious.
Eben has built his house just below the dam's outlets which soon proves to be a mistake. A fierce storm aproaches and the gates need to be open but because of his home Eben refuses.
When Captain Scott's boat is missing he is determined to track down the perpetrators. On their trail Scott learns that the two fugitives are headed to Canada and he must stop them before they reach their destination.
A father violently objects to his daughter's boyfriend and makes drastic threats against the young man. When Captain Scott learns of the situation he feels he must step in to prevent a tragedy.
An old timer in the community starts telling folks of an unusual display of evening lights. Captain Scott interviews the man and wonders if he witnessed an explosion of an aircraft.
A young man has several accidents while boating with his grandfather letting him know of his disappointment. Telling his grandson he will never make it as a sailor, Scott intervenes to reconcile the two family members.
