When Louise is accused of a theft at school, Linda uses her position as school office volunteer to try and solve the case from the inside.

Nonnatus House is abuzz with excitement as the countdown to Trixie and Matthew’s wedding begins. Whilst Sister Veronica has appointed herself in charge of organising the wedding gifts, Trixie’s brother, Geoffrey Franklin, arrives from Malta and immediately starts arranging the perfect hen do. However, the approaching nuptials cause stress levels to escalate as a catalogue of small and great disasters threaten to spoil the day. Dr Turner, Shelagh and Timothy are first on the scene of a fatal car crash. Dr Turner experiences the biggest test of his career as they race against time to save a precious life. Meanwhile, Nancy considers her future, and Sister Julienne hatches a plan to save Nonnatus House once and for all.

Peter is mistaken for being a single parent, and relishes in the perks that come with it.

When a mystery woman attacks the founder of an AI company, the NCIS team must identify the woman before the next major global conflict ensues. Also, Kilbride’s ex-wife, Elizabeth, comes to visit and asks him to think about reconnecting with their son.

Six months after Wujing's escape from custody, Reddington mysteriously resurfaces in Manhattan amidst an explosion. When a former Blacklister is found at the scene, the Task Force begins to investigate a larger conspiracy at play.

When Carl is smitten by a beautiful black woman, he looks into the roots of his own identity by discovering the origins of a mysterious rodeo buckle.