Some unique elements are copied from this earlier version, including the idea that Eb's mother died from his birth, and the use of the same music at Fezziwig's party.
At 29:53 During the Charles Dickens Christmas party, Steed has a conversation with Jacob Marley's ghost. Patrick Macnee played the young Jacob Marley in the 1951 classic A Christmas Carol. Mervyn Johns also appears.