When Kenzo gives Susan her present of moisturiser cream. Zoe Wanamaker winks at the camera, this could be a nod to her character Cassandra from Dr Who, Episode, New Earth. She keeps requesting her servant Chip to moisturise her.
In an interview with TV listings magazine What's on TV in 2011, Daniela Denby-Ashe admitted that she kept the fat suit (in fact she was only kidding at this bit!) that she was required to wear whilst filming the scenes that were set in 2039, also she had to have more make up done as well to show that Janey had aged
This would be the second of two Christmas specials that Sally Bretton would appear in over Christmas 2009, as she would also appear in that year's Not Going Out Christmas special on Wednesday 23rd December 2009 as well.