A lorry is found with people locked inside, some dead. Withthe survivors refusing to speak, Nikki and the team must usetheir pathological and forensic skills to identify them.
The battle of the clay returns, as 12 home potters compete tobecome champion of the pottery. They take on a birthday tea setchallenge, and make handleless jugs.
It is May 1968, and the Nonnatus team are faced withchallenging cases, one of which is much closer to home asLucille struggles with her own health. At a coffee morning forexpectant mothers, Sister Julienne meets heavily pregnantLilian Reynolds, who is expecting her first child. However,after Lilian experiences some breast discomfort, she receivesa devastating diagnosis.Meanwhile, Shelagh is organising theWhitsun Maypole celebrations at the eleventh hour. She enlistsCyril, Fred, Dr Turner, Sister Monica Joan, SisterVeronica, Nancy, Violet and Miss Higgins to help, but thepreparations for a Maypole dance routine are far from smooth.
The mystery of Heather's black eye still has everyone uneasy:Whitney presses for more answers, but this pushes bad weatherinto an even worse spot; Meredith hosts a mental awarenessfundraiser in honor of her nephew.
Fatima sets a plan in motion to get back at Hayden: Zac andFatima travel into uncomfortable territory with Karen, puttingtheir relationship to the test.
Jimmy Carr hosts the game show mash-up, as Jonathan Ross andJoe Wilkinson take on Roisin Conaty and Ahir Shah. CatherineCohen joins Susie Dent in Dictionary Corner, while RachelRiley looks after the numbers and letters.
Neurosurgeon Rowan Fielding has a problem -- when she getsmad, she kills with her mind; her search for answers sendsher toward her secretive biological family; in New Orleans,Deirdre Mayfair is desperate to escape from her aunt'soppressive house.
Wracked with grief over Ellie's death, Rowan is out of controland unfit to perform surgeries; her paranoia that someone isfollowing her is proven true; in New Orleans, Deirdre and hermysterious companion Lasher work together to draw Rowan home.