As is common with long-running shows, Call The Midwife has had some cast changes during its run. In Season 3, the show lost a fan favorite, Jenny Lee, bidding farewell to Jessica Raine's character. Then, in Season 5, the period drama lost another dearly beloved character in Sister Evangelina. What seemed to be a long-awaited death was revealed to be a necessary decision.
Source：https://www.cbr.com/why-pam-ferris-left-call-midwife/
