With Hetty framed by Sheila and locked up by Matron it looks like she won't get the escape letter to Matthias in time for their midnight breakout.

It's Hetty and Gideon's borrowed birthday but how can Hetty celebrate with her brother when girls are not even allowed to mix with the boys?

Mathias is back and a shadow of his former fearless self. With the hospital on lockdown in order to mass-produce toys that are supposedly earmarked for charity, the children start falling ill.

Matron's sister arrives to deliver bad news about her mother. Hetty's feisty little borrowed sister Eliza arrives at the hospital and, like Hetty, clashes with Matron.

Kindly nurse Winterson is sacked by Matron so Hetty convinces the children to go on strike. Will Matron capitulate before the choir debut their new anthem in order to win a £100 donation for the school's organ?

Hetty and Sheila are forced to work together in the infirmary. The boys compete in a series of gruelling army tests in order to win a place as a drummer boy in the army.

A distraught couple come to the hospital to reclaim their child. Gideon plans on escaping in search of his parents, but Vince and Judd have other plans.

It is open day at the hospital, and Matron tasks Hetty with looking after Lord Upton's snooty daughter Charlotte. Matron has plans to send Hetty to India as Charlotte's maid.

When Hetty finally escapes from the hospital, Matron goes on the warpath and thinks she knows where to find her. The gang try to expose Matron's true intentions behind Hetty's planned trip to India.

Hetty risks getting into serious trouble with Matron when she makes a desperate promise.

Hetty is shocked when a wealthy couple want to adopt one of her friends.

Gideon tells a lie, which gets Hetty into trouble, and Matron has mysteriously disappeared.

Hetty is determined to discover what secret Matron is hiding in the basement.

A tragic accident brings Hetty and Sheila together to find the truth.

Hetty is excited when an explorer talks about her adventures, and there's a snake on the loose.

Hetty plays a practical joke on Matron that has frightening consequences for everyone.

Hetty discovers news that will change her life forever.

Will Hetty be able to keep the truth about her real mother a secret?

Hetty discovers an explosive secret, while Gideon fears he caused Edwin's life-threatening accident. Fierce Lady Grenford arrives to help Rosamund with the birth of her new baby.

Hetty is forced to cover when Rosamund goes missing on the day of the christening, while Gideon and Jack find themselves in muddy trouble. Mrs Brody takes control of the house.

A new arrival at the Hall threatens Agnes and Sheila's jobs while Gideon falls out with Emily. Sheila struggles looking after Constance and Jack helps Edwin overcome his fears.

Hetty steels herself to face her old enemy, while Lady Grenford introduces the family to her handsome young grandson, Robert. Emily is excited when a suffragist visits the house.

Agnes's job is put at risk when her family secret is revealed, while Emily argues with her father about her future. Jack thinks Gideon has betrayed him.

Hetty and Gideon are shocked when a figure from their past turns up unexpectedly, while Lizzie is terrified by the story of a savage wolf boy on the grounds. A mysterious new tutor arrives for the children.

An accident in the kitchen forces Sheila to choose between loyalty to the cook or her own ambition, while Jack is stunned to discover the identity of a thief. Hetty reveals she doesn't trust Mrs Brody - but is this a mistake?