Read more:Thomas also spoke specifically about the season 15 finale, which was "both hard to write and beautiful to write". Call the Midwife stars Helen George, Renee Bailey, Natalie Quarry and Megan Cusack at the Radio Times Covers Party. Add Radio Times as a Preferred Source on Google Keep up to date on what’s worth watching with your favourite entertainment news from Radio Times – see more of our exclusive news and interviews featured prominently in Top Stories when using Google. Call the Midwife season 15 continues on BBC One and BBC iPlayer on Sunday at 8pm. For more TV recommendations and reviews, listen to The Radio Times Podcast.