Despite his grim discovery, Tulkinghorn remains undeterred from his ruthless inquiry into Lady Dedlock's past. A young crossing sweeper, Jo, may hold a key to the mystery. Krook discovers evidence in Nemo's room which could provide a crucial clue. Richard and Ada plan their engagement, but receive an unexpected setback. And as Richard begins a career in medicine, Esther meets an attractive young doctor called Allan Woodcourt.

As Tulkinghorn edges closer to the truth, Lady Dedlock puts her reputation at risk when she pays an undercover visit to Nemo's former haunts. John Jarndyce finds himself increasingly attracted to Esther, but Richard makes an announcement which causes him dismay. And Woodcourt has news that comes as a terrible blow to Esther.

A chance encounter in the country raises intriguing questions for Esther and Lady Dedlock. Legal clerk Guppy, still besotted with Esther, discovers surprising new information about her past and decides to dig deeper still. And Lady Dedlock's secret is far from safe, as Tulkinghorn stumbles across a lead which could destroy her reputation forever.

Richard's inability to settle causes a rift with John Jarndyce, much to Ada's dismay. Tulkinghorn finally unearths the possible identity of the mysterious Nemo. Nemo's old friend Sergeant George has the evidence he needs to prove it and Tulkinghorn will stop at nothing to force George to hand it over. But George has even more problems when Gridley turns up on his doorstep, on the run from the law and infected with the fever.

George's future is put at risk as Tulkinghorn uses the evil moneylender Smallweed to pile on the pressure. Guppy makes a discovery about Esther which shocks Lady Dedlock to the core. Esther and Jarndyce take in Jo the crossing sweeper, who is seriously ill and on the run from Tulkinghorn's men. But their kindness produces an unexpected result.

George has to make an impossible decision when Tulkinghorn and Smallweed turn up the heat on his debts. Guppy's quest for information takes him back to Krook's shop, with explosive results. Jarndyce is beside himself when tragedy strikes Bleak House.

Tulkinghorn is now close to piecing together Lady Dedlock's secret. Esther struggles to come to terms with the terrible blow she has been dealt. Jarndyce agonises over whether to keep his own feelings for Esther concealed. Lady Dedlock tells Esther something that will change her life for ever.

Esther is shattered by Lady Dedlock's revelation. Richard's obsession with the Jarndyce case has grown to worrying proportions. Guppy puts himself at risk when he gets in the way of Tulkinghorn's enquiries. And Tulkinghorn at last has cast iron proof of Lady Dedlock's guilt, and issues her with a terrible ultimatum.

Tulkinghorn believes Lady Dedlock is in his power, but she continues to defy him. George's anger knows no bounds when Tulkinghorn breaks his promise and leaves him in financial ruin. And a marriage proposal surprises Esther - but is it from the right man?