Jackson and Reid must bring down assistant commissioner Augustus Dove.
With Reid locked in the cells of Leman Street police station, all hope seems lost.
Thatcher discovers a fresh lead of a double murder committed by Nathaniel.
Serial killer Nathaniel Dove goes into hiding deep in the Hackney Marshes.
Long Susan enlists the help of trusted friends to help get her son back.
Edmund Reid, Homer Jackson and Long Susan band together to avenge Bennet Drake's death.
The Crown unleashes one final plan to destroy James.
A wedding is hastily arranged following an unexpected turn of events.
A famous actress drops dead onstage, and Blake has just one night to solve the murder.
The legacy of thalidomide becomes apparent and Nurse Crane faces an unexpected crisis.
A young woman is shot dead at a bonfire night celebration.
James Delaney finds himself alone with the mysterious Dr Dumbarton.
Sarah is warned by Carolyn that Regina has escaped her intended incarceration.
Having finally been convinced of Regina's duplicity, George warns Elizabeth to be careful.
Valerie Dyer cares for a pregnant Somali woman whose culture has some unfamiliar aspects.
Anna presents Elizabeth with the manuscript of House of Lies.
Sarah's friends and neighbours wait anxiously while she goes through a difficult birth.
Carolyn and Jack visit Douglas and learn that Sir Richard is up to his dirty tricks.
A devastating betrayal puts James Delaney's freedom in jeopardy.
Harry notices that Sarah is being followed so Roy questions Gordon.
Regina is plotting against Sarah with Sergeant Taylor.
Nonnatus House welcomes a new recruit, and a young man captures Fred and Violet's hearts.
Elizabeth has a brain-wave of how to ruin Regina's reputation.
Elizabeth has to time her return home with military precision.
Ash Park prepares for the visit of the Prime Minister.
Sarah confronts Regina about her suspicions regarding the death of Milly Davis.
Inverness is shocked by the death of young teacher whose fiance is serving overseas.
An expectant mother with money worries enters into a painful arrangement with her cousin.
The Company declares war on James, whilst a revelation drives him to dark, haunted places.
Douglas Goddard calls on Elizabeth and invites her to go on holiday with him to Luxor.
Gino is upset when he accidentally finds and reads Ann's unpublished novel.
The maternity home faces closure and Barbara cares for a Chinese first-time mother.
After a duel at dawn, James Delaney is blackmailed into a dangerous mission.
Blacklisted, James Delaney sets out to protect his business by any means necessary.
Regina travels to Sydney to bring James back.
Rene is distraught on learning of Sarah's pregnancy.