Documentary in which Stephen McGann, who plays Dr Patrick Turner, explores the social and medical changes that took place in the 1950s and 60s relating to childbirth. Along the way, Stephen meets midwives, nuns and doctors who helped deliver babies during the period. As well as archive footage and expert interviews, the programme features clips from past editions of Call the Midwife, footage of the new sixth series and an interview with creator and writer Heidi Thomas.