Sam (Scott Bakula) is Reginald Pierson, the valet of one Michael Blake (Charles Rocket), a Scrooge-like character in Quantum Leap’s take on A Christmas Carol. A Little Miracle aired 21 December, 1990 and was penned by Sandy Fries and Robert Wolterstorff. It’s Christmas Eve, 1962, and Sam is feeling a little flustered serving Blake, who…