Baywatch

The most-watched series in TV history, Baywatch's international appeal lies squarely in the conspicuous presence of attractive, buxom lifeguards -- as well as Hasselhoff's star power outside the United States. But despite the show's obvious sex appeal and silly plotlines (like battling ghosts in a haunted hotel or fighting a giant moray eel with heart defibrillator paddles), it also offers some positive messages about leadership, teamwork, and even parenthood, thanks to Mitch's role as a single parent to son Hobie (Jeremy Jackson). The show also touches on important issues like water safety, addiction, and the multiple and often little-known health risks associated with excessive sun exposure.

Despite Baywatch's relatively high dose of sex appeal, its innuendo quotient is actually pretty mild compared to many of today's shows. Still, some of the romantic storylines are decidedly adult, and the rescue scenes -- many of which show people drowning and being resuscitated -- might be scary for some kids. But for older teens and adults, it has been -- and always will be -- a guilty viewing pleasure.