"It all started when a time-travel experiment I was conducting went...a little ca-ca. 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 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..."

"Theorizing that one could time-travel within his own lifetime, Dr. 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, Dr. 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 maintained through brainwave transmissions with Al, the Project Observer, who appears in the form of a hologram that only Dr. Beckett can see and hear. Trapped in the past, Dr. 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."

"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."

"When I pitched this idea to Brandon Tartikoff and he told me to explain it to him in twenty seconds so his mother could understand it, I decided not to get into the physical aura aspect of it."

"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!"

"Oh, boy..."

"Stephen Fry - General Sir Anthony Cecil Hogmanay Melchett"

"Tim McInnerny - Captain Kevin Darling"

"Miranda Richardson - Nurse Mary"

"Rik Mayall - Lord Flasheart"

"Rowan Atkinson - Sir Edmund Blackadder"

"Stephen Fry - King Charles I"

"Rowan Atkinson - Ebenezer Blackadder / Lord Edmund Blackadder / Edmund Blackadder, Esq. / Grand Admiral Blackadder"

"Tony Robinson - Baldrick / Baldrick / Sod-Off Baldrick / Baldrick"

"Miranda Richardson - Queen Elizabeth I / Asphyxia XIX"

"Stephen Fry - Lord Melchett / Lord Frondo"

"Hugh Laurie - George, the Prince Regent / Lord Pigmot"

"Robbie Coltrane - Spirit of Christmas"

"Miriam Margolyes - Queen Victoria"

"Jim Broadbent - Prince Albert"

"Rowan Atkinson - Lord Edmund Blackadder / King Edmund III / Centurion Blackaddicus"

"Tony Robinson - Sod-Off Baldrick / Baldricus"

"Miranda Richardson - Lady Elizabeth / Queen Elizabeth"

"Hugh Laurie - Viscount George Bufton-Tufton / Consul Georgius"

"Stephen Fry - Bishop Melchett / Melchett / General Flavius Melchius / The Duke of Wellington"

"Rik Mayall - Robin Hood"

"Colin Firth - William Shakespeare"

"Kate Moss - Maid Marian / Queen Marian of Sherwood"

"Simon Russell Beale - Napoleon"

"Jennie Bond - Royal Reporter"

"Crispin Harris - Friar Tuck"

"Tim McInnerny - Archdeacon Darling / Duc de Darling / Duke of Darling"

"Miranda Richardson - Queen Elizabeth I"

"Stephen Fry - Lord Melchett"

"Patsy Byrne - Nursie"

"Tony Aitken - Minstrel"

"Rik Mayall - Lord Flashheart"

"Hugh Laurie - Prince Ludwig"

"Tom Baker - Capt. Rum"