Edward Baker-Duly

Sir Hallam Holland and his beautiful wife Lady Agnes inherit a dilapidated 165 Eaton Place, and set about restoring the house to its full glory. Former housemaid Rose Buck finds herself back in the house where she was happiest, but the arrival of an unwelcome guest puts a strain on relations, both upstairs and down.

The Duke of Kent asks for Sir Hallam's help; Lady Agnes worries about the upcoming birth of her child.

As the threat to Kitty's safety causes her to unravel, Watson and Sherlock ramp up their efforts to help her; information about the origin of Sherlock and Kitty's relationship is revealed.

Hank, Evan and Paige try to help Eddie have a relationship with Emma; Hank treats a private investigator; Divya must find a nanny; Jeremiah makes a friend.