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?

Hetty and Gideon search for proof of Jack's innocence, while Emily discovers Mr Buscombe has a secret - but is he telling the whole truth? Lady Grenford has a startling plan for Emily and Robert.