Sam: Oh, boy...
[repeated line - season 2]
Narrator: Theorizing that one could time travel within his own lifetime, Doctor Sam Beckett led an elite group of scientists into the desert to develop a top secret project, known as QUANTUM LEAP. Pressured to prove his theories or lose funding, Doctor Beckett, prematurely stepped into the Project Accelerator and vanished. He awoke to find himself in the past, suffering from partial amnesia and facing a mirror image that was not his own. Fortunately, contact with his own time was made through brainwave transmissions, with Al, the Project Observer, who appeared in the form of a hologram that only Doctor Beckett could see and hear. Trapped in the past, Doctor Beckett finds himself leaping from life to life, putting things right, that once went wrong and hoping each time, that his next leap will be the leap home.
the Devil (as Al): What gives you the right to leap about time, putting right what I made wrong.
Sam: I'm just trying to get home.
the Devil (as Al): Well, you're not going to make it!
Sam: I can't have a life. All I do is live someone else's life. I right their wrongs, I fight their fights - geez, I feel like I'm Don Quixote.
[repeated line - season 1]
Sam: It all started when a time travel experiment I was conducting went... a little ka-ka. In the blink of a cosmic clock I went from quantum physicist to air force test pilot. Which could have been fun... if I knew how to fly. Fortunately, I had help. An observer from the project named Al. Unfortunately, Al's a hologram, so all he can lend is moral support. Anyway, here I am. Bouncing around in time, putting things right which once went wrong. A sort of time traveling Lone Ranger, with Al as my Tonto. And I don't even need a mask. Oh boy.
[his life in the 70's]
Sam: Great. I'm on the take, I wear polyester clothes and I live above a bar in an apartment decorated like a gym.
Sam: Leaping about in time, I've found that there are some things in life that I can't change, and there are some things that I can. To save a life, to change a heart, to make the right choice. I guess that's what life's about}: making the right choice at the right time.
Al: Don't do anything I wouldn't do. And if you do, take pictures.
[talking about God]
Sam: In case you haven't noticed, Al, the Committee isn't running this Project anymore... He is.
Sam: The fact that you were a practicing pervert at the age of 5 has nothing to do with the rest of the world!
Al: Don't tell me, let me guess, you've been invited to a costume party and you're going as a baked potato.
Sam: Where the hell were you?
Al: I was at the Laker game. It went into overtime.
Sam: A ball game? I nearly died because you were at a ball game?
Al: It wasn't just a ball game. It was a play-off game. At the party later, I met this dish named Martha.
Sam: I guess I can thank God you didn't spend the night with this Martha.
Al: Well, I did.
[repeated line - seasons 3-5]
Narrator: Theorizing that one could time travel within his own lifetime, Dr. Sam Beckett stepped into the Quantum Leap accelerator and vanished. He awoke to find himself trapped in the past, facing mirror images that were not his own and driven by an unknown force to change history for the better. His only guide on this journey is Al, an observer from his own time, who appears in the form of a hologram that only Sam can see and hear. And so, Dr. Beckett finds himself leaping from life to life, striving to put right what once went wrong and hoping each time that his next leap will be the leap home.
Al: If we knew the unknown, the unknown wouldn't be unknown.
Al: [singing, trying to remember the lyrics] All around the something... the monkey chased the weasel... the monkey did something... and something happened to the weasel.
Al: Women - you can't trust 'em. They don't understand the double standard.
Al: We're making preparations for Tina's birthday party and she wants me to pop out of the cake. You'll never believe what she wants me not to wear.