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A fisherman finds a float from Tim's crashed aircraft. When Karl, Kate, Hooter, Tom and Robert search the area, they find no clues, so they enlist the help of Captain Dirksen of the Canadian Fisheries patrol vessel, Laurier.
Sandra, Karl's daughter-in-law and the mother of Robert and Arnie, comes to Ritter's Cove to take the boys back to Toronto with her.
Karl has his doubts about rushing to the aid of Mulligan, an old prospector, who often says that he's injured just to get a free flight out of the bush. After some hesitation, Karl, Kate and Robert go to see if Mulligan is really hurt.