Bryony Hannah, Helen George, and Jessica Raine in Call the Midwife (2012)

Pam Ferris at an event for Call the Midwife (2012)

Pam Ferris, Pippa Harris, Heidi Thomas, Helen George, and Jessica Raine at an event for Call the Midwife (2012)

Heidi Thomas at an event for Call the Midwife (2012)

Pam Ferris, Helen George, and Jessica Raine at an event for Call the Midwife (2012)

Pippa Harris at an event for Call the Midwife (2012)

Helen George at an event for Call the Midwife (2012)

Helen George and Jessica Raine at an event for Call the Midwife (2012)

Jessica Raine at an event for Call the Midwife (2012)

Linda Bassett, Leonie Elliott, Helen George, and Jennifer Kirby in Call the Midwife (2012)

Ben Caplan, Stephen McGann, Bryony Hannah, Helen George, and Jessica Raine in Call the Midwife (2012)

Jenny Agutter, Bryony Hannah, Miranda Hart, Helen George, and Jessica Raine in Call the Midwife (2012)

Simon Polo-Clarke in Call the Midwife (2012)

Miriam Margolyes in Call the Midwife (2012)

Keenan Munn-Francis in Call the Midwife (2012)

Jenny Agutter, Judy Parfitt, Jennifer Kirby, Alice Brown, and Ella Bruccoleri in Call the Midwife (2012)

Leonie Elliott and Zephryn Taitte in Call the Midwife (2012)

Leonie Elliott, Helen George, and Zephryn Taitte in Call the Midwife (2012)

Victoria Yeates and Hannah Morrish in Call the Midwife (2012)

Charlotte Ritchie and Helen George in Call the Midwife (2012)

Victoria Hamilton in Call the Midwife (2012)

Jenny Agutter, Ben Caplan, Pam Ferris, Miranda Hart, Emerald Fennell, Helen George, Victoria Yeates, Peter Noakes, and Liam Kiff in Call the Midwife (2012)

Charlotte Ritchie in Call the Midwife (2012)

Pam Ferris and Judy Parfitt in Call the Midwife (2012)

Annabelle Apsion in Call the Midwife (2012)

Emerald Fennell, Charlotte Ritchie, and Helen George in Call the Midwife (2012)

Leonie Elliott, Charlotte Ritchie, Helen George, and Jennifer Kirby in Call the Midwife (2012)

Jenny Agutter, Linda Bassett, Stephen McGann, Cliff Parisi, Laura Main, Helen George, Victoria Yeates, and Jennifer Kirby in Call the Midwife (2012)

Leonie Elliott in Call the Midwife (2012)

Jenny Agutter, Linda Bassett, Stephen McGann, Judy Parfitt, Cliff Parisi, Laura Main, Bryony Hannah, Charlotte Ritchie, Helen George, and Victoria Yeates in Call the Midwife (2012)