Call the Midwife season 15 episode 2 cast from soap stars to West End actors

Back at Nonnatus House, all of the main cast will return for the second episode, including Jenny Agutter as Sister Julienne ...

Who is joining the cast of Call the Midwife season 15 episode 2?

BBC Call the Midwife season 15, episode 2 sees Rosalind and Cyril take another step forward in their relationship.