The series will now screen on Thursday nights, replacing Janet King.
Based on the memoirs of Jennifer Worth, the series returns to follow nurse Jenny Lee and the midwives from Nonnatus House convent, who visit the expectant mothers of Poplar once again.
In the first episode of Series 3, Jenny struggles to care for exhausted mother Merle Vickers (Gemma Salter) and her two sickly sons, it is Sister Monica Joan (Judy Parfitt) who holds the key to the diagnosis of their mystery illness. Meanwhile, Chummy calls on her royal connections for the official opening of the new ante-natal and baby clinic, and Nonnatus House welcomes a new resident, Sister Winifred.
8:30pm Thursday April 24 ABC1.