This show was filmed before "Gold Train: The Bullet", and actually was Milburn Stone's first work on the show after he recovered from heart surgery. For some reason, the premiere of this show was postponed a week and aired after Christmas.
This show was aired after, but filmed before, Doc Adams' "official" return in Gold Train: The Bullet. No one seems to know why it would air two days after Christmas (bumped from the previous week by a CBS special, apparently).
Among the actors portraying the orphans, several went on to star in TV shows and movies: Patti Cohoon (Apple's Way), Jodie Foster (numerous films and TV shows), Erin Moran (Happy Days), Brian Morrison (Maude), and Willie Aames (Eight is Enough).