Surfside 6 - Season 1 Episode 2 High Tide
Overview: A woman, who identifies herself as a ""boring stenographer on vacation"", shows up at the houseboat with three thugs after her. After Sandy and Ken fend off the men, Sandy takes the woman for a drink -- and she promptly disappears on him. He's out to find out where the ""boring stenographer"" went and why men were tailing her.