<P> Her steadfast, compassionate guidance makes her an anchor for her colleagues and in a very real way, it is she who holds the inhabitants of Nonnatus House together . She always offers comfort and help to the young midwives and also has a notably close, warm and maternal relationship with Sister Bernadette, serving as her chief mentor and confidante . Beginning with series 4, it becomes clear that the weight of always having to be "the wise one" takes a heavier toll on her than many would guess, and she is increasingly shown leaning on Shelagh (formerly Sister Bernadette) for counsel and support; nevertheless, her faith is not shaken and she remains a serene, guiding presence for all of Nonnatus House . Her pre-Order name was Louise . </P> <P> In the sixth series after her return from Africa, Sister Julienne becomes Deputy Sister - in - Charge to Sister Ursula . Although Sister Ursula leaves in the third episode and Sister Julienne becomes sister in charge again . </P> <Table> <Tr> <Th_colspan="2"> Sister Monica Joan </Th> </Tr> <Tr> <Th_colspan="2"> Call The Midwife character </Th> </Tr> <Tr> <Th> Portrayed by </Th> <Td> Judy Parfitt </Td> </Tr> <Tr> <Th> Duration </Th> <Td> 2012--</Td> </Tr> <Tr> <Th> First appearance </Th> <Td> Series 1, Episode 1 </Td> </Tr> <Tr> <Th> Introduced by </Th> <Td> Jennifer Worth </Td> </Tr> <Tr> <Th> Classification </Th> <Td> Present; regular </Td> </Tr> <Tr> <Th_colspan="2"> Profile </Th> </Tr> <Tr> <Th> Occupation </Th> <Td> Nun, retired midwife and nurse </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Sister Monica Joan </Th> </Tr>

Who plays the old nun in call the midwife