A Nagging Doubt
Series 4, Episode 1 M
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Sarah's suspicions are aroused when she realises that the death of the local teacher, Milly Davis, may not have been a suicide as first suspected. Regina's guilt weighs heavily on her conscience when it becomes apparent that the tonic she poisoned with rat bait, originally meant for Sarah, was given to Milly instead.
Bad in a Good Way
Series 4, Episode 2 M
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Olivia confirms to James that she was carrying a stillborn child, and due to this, she went through with an illegal adoption to obtain baby George. She then agrees to continue to forge a united force with her husband in order to help George win the election, and promises Lloyd that she will wait for him.
When You're Smiling
Series 4, Episode 3 M
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Ash Park prepares for the visit of the Prime Minister and his wife in support of George's election campaign. Sarah is turned away from the school on being told that parents are complaining about her communist sympathies. Olivia returns to Ash Park and James is beginning to learn how to relax in public with Henry.
Home to Roost
Series 4, Episode 4 M
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Regina's anxiety of the arrival of Sir Robert Menzies causes issues between her and Anna which flares and results in Regina slapping Anna across the face. George's wound from his shooting begins to cause him pain, which leads Regina to talking him into taking morphine, which in turn leads to Regina abusing the substance.
Happy Days Are Here Again
Series 4, Episode 5 M
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Anna's attempts to use Jack and Carolyn's story as the major plotline of her novel are quashed when they ask her not to dredge up the past for the sake of their upcoming nuptials, which leads Elizabeth, Sarah and Anna to formulate a plan to destroy Regina - Anna shall pen a novel about a librarian who is poisoned, in hope that Regina's reputation will be ruined beyond repair.
The Trouble with Harry
Series 4, Episode 6 M
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James is delighted when Elizabeth and Olivia encourage him to go spend three days in the city with Henry, however when he does, he begins to dream of, and remember, Harry. Elizabeth worries that she and Sarah will fallout after she and George learn of Harry's presence in town.
You're Just in Love
Series 4, Episode 7 M
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News of George's electoral win spreads around Inverness as the Country Party member. Gordon's presence becomes apparent when Harry sees him following Sarah and informs Roy. When Gordon prepares to shoot Sarah, he learns she is pregnant and tells Brian that when she has given birth, he will come back and kill her.
There'll Be Some Changes Made
Series 4, Episode 8 M
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Jack and Douglas take matters with Sir Richard into their own hands when the refuge comes under threat, Sir Richard begins to pick off Douglas's sponsors for the refuge. As Jack's plan to avenge Carolyn reaches its climax Carolyn begs him not to go ahead with the plan to which Jack decides he must do what he knows is right.
Where Will the Baby's Dimple Be
Series 4, Episode 9 M
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Sarah goes into a long and difficult labour. James supports Olivia when she heartbreakingly learns that her plans to leave Ash Park and start a life with Lloyd are dashed. Elizabeth gets a wonderful surprise. Sarah gives birth to a baby boy but he struggles to breathe leaving him in a critical condition.
And the Blind Shall See
Series 4, Episode 10 M
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Anna and Gino arrive from Italy to learn that Anna is unable to conceive children. Sarah and Anna's plan to destroy Regina pushes Gino to his limit and he explodes at Anna expressing his disgust to Anna at the Bligh family secrets.
Catch the Tiger
Series 4, Episode 11 M
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The tension between James and Henry escalates after James invites Harry to an unconventional party. Regina continues her affair with Sergeant Taylor. Milly Davis's fiancé continues his discreet investigation of Sarah to avenge his fiancée's suicide-murder, and realises he has been played by Regina who wants Sarah dead.
All Good Things
Series 4, Episode 12 M
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Sarah is warned by Carolyn that Regina has escaped her intended incarceration in an asylum and to be on guard, but Sarah believes her to be long gone. Elizabeth is exasperated with Rose, who refuses to divulge her mistress's whereabouts.