Oh, boy. Nobody can resist a time-travel story, especially when the sci-fi aspect is toned down in favor of drama. Quantum Leap put a twist on time-travel, having the main character, Dr. Sam Beckett, actually inhabit the bodies of people living in the past. That included women, kids and in one memorable occasion, a chimp.

Created by Donald Bellisario, the series started with a sci-fi cliche: the experiment went wrong. The project was called Quantum Leap and the theory posited by Dr. Beckett was that a human being could travel within his own lifetime with the aid of a particle accelerator. Dr. Beckett was indeed able to travel into the past but he woke up in a body that was not his own, with most of his memory missing. Lost and confused, Sam could only rely on the help of Al (Rear Admiral Albert Calavicci), his associate in the Quantum Leap project, who appeared as a hologram tuned to Sam's unique brainwaves. That made Sam the only one who could see Al (with the exception of children, animals and mental patients).

The show mixed metaphysics with science when Sam felt the need to "right what once went wrong" in the lives of his hosts or the people around them. Traveling through four decades, Sam leapt into a diverse collection of people: a black chauffeur during the civil rights struggle, a pregnant teenager, a mentally challenged young man, and Al himself in his younger days in the Navy. Luckily, Sam was a genius with multiple PhD.s and slew of skills at his disposal, despite the random holes in his memory ("swiss cheesed," Al called it). Al was Sam's link to his own time and to his colleagues back at the project, like Gushie, another scientist, and Ziggy, the supercomputer that tracks Sam in all his incarnations.

The series played loose and fast with the laws of physics and its own rules. Though all leaps occurred within Sam's own lifetime, he did travel back to the Civil War era in one episode, inhabiting the body of his own ancestor. Dr. Beckett, that dog, even managed to father a daughter in one of his leaps, who grew up and joined the Quantum Leap project as she turned out to be a genius like her dad.

The show had cult appeal even if the ratings didn't break any records. The appeal of seeing the lives of ordinary people living in the past, the casual brushes with historical events and Scott Bakula's noble, yet feckless, portrayal of Dr. Beckett inspired fans long after Quantum Leap was cancelled.

YouTube: