Call the Midwife

Season 4

1. In all other episodes, Vanessa Redgrave narrates the opening and closing sequences as the "Mature Jenny" character in voice only. In this Christmas special, she plays the part in person.

1. The story of the children who were sent to Australia, is told in the movie "Oranges and sunshine".
2. In the mothercraft class, the mother who brings up Dr. Spock and breastfeeding is scoffed at and another mother says Americans probably can't even get Carnation milk. Not true (and probably meant for comedic effect). The Carnation Company is an American company dating from the 1850s based in Carnation, Washington.

1. Sister Julienne (Jenny Agutter)'s first name is revealed to be Louise.

1. Linda Bassett (Nurse Phyllis Crane) & Matilda Ziegler (Dulcie Roland) also worked together on Lark Rise to Candleford (2008) as Queenie Warner & Pearl Pratt respectively.
2. Linda Bassett ("Phyllis Crane") and Matilda Ziegler ("Dulcie Roland") who were regulars in "Lark Rise to Candleford", as Queenie Turrill and Pearl Pratt, are reunited in this episode.

1. The last appearance of David Ryall who passed away Christmas Day 2014, 2 months before the transmission.

1. Delia's mother calls her "Cariad," which is the Welsh word for "love."
2. Thalidomide, the drug prescribed to cure morning sickness, was a common drug given to expectant mothers during the late 1950s. Developed in West Germany in 1957, it was marketed as a "wonder drug" that could cure various ailments. At the time, it was unknown that the drug was teratogenic, or harmful to fetal development; in fact, this was never tested, as scientists mistakenly believed that substances taken by the mother did not pass the placental barrier to the fetus. As such, about 10,000 babies worldwide were born with major birth defects due to their mothers' use of thalidomide during pregnancy, and only half of these babies survived. This eventually led to stricter drug testing and regulations, especially with drugs intended for pregnant women.