So where does Call the Midwife go from here? The BBC has already announced that it has been recommissioned for a fourth series. With the series on the cusp of the 1960s, scriptwriter Heidi Thomas will probably turn her attention to the changes wrought by the coming of the Pill in the early 1960s – which in the introduction to her Call the Midwife trilogy Worth describes as the moment “modern woman was born.”