Sunday, 18th April 2021 at 8:48 pm Season 10 of Call the Midwife opens with a storyline that feels horribly familiar to Dr Patrick Turner (Stephen McGann): a baby is born with no legs below the the knees, and passes away shortly after birth. Was it thalidomide, he wonders? Did pregnant mother Audrey Fleming (Kathryn Wilder) somehow get hold of that dreaded anti-nausea drug? Is he to blame? Advertisement But after talking with Audrey’s husband Derek Fleming (Jack Colgrave Hirst), it dawns on Dr Turner that this might be another scandal entirely. Derek, who is suffering from increasingly severe stomach problems, reveals that he and his National Service friends were all involved in Operation Grapple – and were deployed on Christmas Island, where they witnessed hydrogen bomb tests up close.