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.

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 searches the streets of London for Ida, not realising Matron has her own plans to find her. Will the police reach Hetty first, before Matron's friend gets rid of her forever?

Hetty helps a street girl who breaks into the hospital looking for safety. However, they are unaware that Matron has her own reasons to find the young girl first.

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.

It's the day of the fair and Gideon makes a surprising discovery about Jack, while Hetty realises Mrs Brody is out to get her. Sheila and Constance battle to become the Festival Queen.

Hetty and the gang play a prank on Sheila, but it has disastrous consequences when a young visitor with a secret arrives to stay at Calendar Hall.

Jack has a romantic proposal in mind, but a new butler spells trouble for the gang, while Ashok reveals his secret – a priceless diamond hidden in Calendar Hall.

The gang follow clues as they search for the Dawn Star, not realising that Ambrose is looking for it, too. Rosamund surprises everyone when she brings an old enemy back to the house.

Hetty and the gang find crucial clues to the Dawn Star, although Flo and Ambrose are now watching them closely and Lady Grenford appears to know more about the diamond than she is letting on.

Lizzie discovers a secret tunnel with a clue, while the gang races Ambrose to find the jewel, and Hetty fears that Ashok is growing too friendly with Lady Grenford.

The gang realise they need to break through a wall to get to the jewel – but can they do it without being discovered? And what will Agnes do when she finds out Gideon’s been lying to her?

The gang are in danger when Rosamund leaves Lady Grenford and Ambrose in charge. Hetty finally cracks the code - but can the gang get to the Dawn Star in time?