Who is the mysterious woman in a bikini lying outside on Quincy's sailboat in the opening of Quincy M.E.?

In the opening of "Quincy M.E.," the mysterious woman in a bikini is revealed to be a key figure in the episode's plot. Her presence sets up the central mystery that Quincy, the medical examiner, will investigate. As the story unfolds, her identity and circumstances become pivotal to the narrative, showcasing the show's blend of crime and medical drama.