The episode features historians Tom Holland and Dominic Sandbrook beginning a five-part series on Jack the Ripper, examining both the notorious murders and the social history of Victorian London at its imperial height.

The discussion opens with the infamous Dear Boss letter sent September 27, 1888 to Central News Agency, which gave the killer his enduring name and established the template for serial killer mythology with its mocking tone and claims of loving the work.

Holland and Sandbrook frame the Ripper case as more than true crime, positioning it as a window into late Victorian society's anxieties about class, poverty, immigration, medicine, policing, and the dark underside of industrial modernity in the world's largest city.

The episode focuses on the murder of Polly Nichols on August 31, 1888, tracing her Dickensian fall from respectable working-class origins through family breakdown, alcoholism, workhouses, and homelessness to her brutal death on Bucks Row in Whitechapel.

The Letter That Named Jack the Ripper

The Dear Boss letter sent September 27, 1888 to Central News Agency contained the signature Jack the Ripper and mocked police: "I keep on hearing the police have caught me, but they won't fix me just yet."

Central News Agency sat on the letter for two days before forwarding it to Scotland Yard, uncertain of its authenticity - it arrived just before the "double event" murders of September 30, 1888.

The letter referenced "leather apron" - a Polish Jewish suspect already in custody - and mocked claims the killer was a doctor: "They say I'm a doctor now. Ha ha."

"I saved some of the proper red stuff in a ginger beer bottle over the last job to write with but it went thick like glue and I can't use it. Red ink is fit enough I hope. Ha ha" - the letter's gruesome joke about using blood versus red ink.

Jack the Ripper as Historical Phenomenon

Jack the Ripper is the first serial killer identified as such in modern terms - "he invents the phenomenon" through newspaper coverage and psychiatric classification in scientific terms.

The case remains notorious because the killer was never caught and the name Jack the Ripper proved "horribly, brilliantly memorable" - creating enduring global fascination.

Australian journalist Leonard Matters wrote in 1929: "If a journalist cannot sell anything else in London, he can always sell a story about Jack the Ripper."

The entire field of "ripperology" exists as a sub-genre of true crime, with countless books proposing theories about the killer's identity - "there is always a danger that you will never ever climb out again."

Victorians described the killer in supernatural terms from the start - "a ghost slipping through the streets," "a ghoul or a vampire," "a being in human shape stealthily moving about a great city, burning with a thirst for human blood."

London 1888: Imperial Capital and Urban Nightmare

London in 1888 had 4-6 million people, making it "indisputably the capital, not just of the British Empire, but of the world" and "the biggest city that's ever existed."

London served as the financial nerve center of global capitalism, a major port, manufacturing hub, and center of world publishing - "what happens in London matters for the entire world."

The city was "full of smoke" that blended with "the famous fog, the notorious fog" - creating an atmosphere that seemed to embody both modernity's promise and its darkness.

Economic downturn since the Panic of 1873 created persistent anxiety - "even at its height, British establishment opinion is still very jittery" with 18,000 missing persons reported in 1887 alone.

Jerry White's study notes dozens of murders annually, a gun crime panic, and pervasive middle-class fear about what was "being bred out there in the East End" - criminals and radicals.

Whitechapel: Victorian London's Darkest Corner

Whitechapel in 1888 was "an absolute kind of reeking, stinking, crowded labyrinth" - a warren of crumbling tenements, DOS houses, and alleys where police allegedly only entered in pairs.

The Daily Telegraph described it as "squalid" breeding grounds where "neglected human refuse as inevitably breeds crime" that "reproduces itself like germs in an infected atmosphere."

Streets had names like Thrall Street, Dorset Street, and Flower and Dean Street - the latter being the epitome of Spitalfields' horrors where "successful thieves, like successful prostitutes, did not stay."

Whitechapel High Street was "the entertainment capital of working class London" full of taverns and music halls, attracting both East Enders and West End "young bloods going up East" for illicit thrills.

The area was packed with slaughterhouses including "the barber's horse slaughterhouse" - creating streets filled with "the scent of blood, piles of offal" and people walking with knives and blood-stained aprons.

Three factors intensified Whitechapel's overcrowding in 1888: Jewish immigration, slum clearance pushing people into remaining alleys, and 1885 brothel crackdowns forcing sex workers into DOS houses.

Bloody Sunday and the Homeless Crisis

1887 was Queen Victoria's Golden Jubilee year, but Trafalgar Square had become "a vast squatter's camp" where homeless people set up shacks and tents around Nelson's Column.

Metropolitan Police Chief Sir Charles Warren banned all public assemblies from Trafalgar Square on November 8, 1887, setting up confrontation with socialists and Irish nationalists.

Bloody Sunday November 13, 1887 saw police supplemented by Grenadier Guards violently clear Trafalgar Square - later commemorated by Russian revolutionaries as an example of potential industrial revolution.

Cleared homeless had "only one place really where they can hope to find shelter, which is the Warren of Streets off Whitechapel High Street" - intensifying the area's desperation.

Martha Tabram: Possible First Victim

Martha Tabram was found stabbed 39 times on August 7, 1888 on a tenement landing just off Whitechapel High Street - local press described her as "butchered" with "virulent savagery."

The Illustrated Police News ran six pictures of the Tabram murder on its front page, while the East London Observer called it "a unique and mysterious crime."

Martha was 39 but looked much older from street life - one witness said she was "a woman who would rather have a glass of ale than a cup of tea," suggesting alcoholism.

The coroner's verdict was "willful murder against some person or persons unknown" - a phrase that "people will be hearing a lot over the weeks and months that are to follow."

Martha "lacks the glamour of the kind of victim who would remain in the newspapers for week after week" - her name seemed destined to be quickly forgotten until the next murder.

Polly Nichols: A Dickensian Tragedy

Mary Ann "Polly" Nichols was born 1845 near Fleet Street to respectable working-class parents - her father was a locksmith, her mother a laundress.

After her mother's early death, young Polly "steps into her mother's shoes" caring for her father "in the way that little Nell looks after her grandfather or little Dorrit looks after her father."

Polly married William Nichols, a printer working for newspapers, and they moved to Woolwich with her father - she had five children in what seemed "a model of domesticity."

In 1880 at age 35, Polly walked out on her husband and five children including a young infant, never returning - "that's her family broken up" in a spectacular bust-up.

William claimed Polly became an alcoholic; Polly thought he'd begun an affair with a young woman - "both those things may have been true" as family breakdown and alcohol are themes across all victim stories.

After leaving her family, Polly entered "a spiral" through workhouses and DOS houses - "in this world of late Victorian Britain, no welfare state or not one worthy of the name, once you're in the spiral, it is very, very hard to get out."

Polly's Descent: From Trafalgar Square to Whitechapel

By December 1887, Polly was homeless and joined squatters in Trafalgar Square - but arrived a month after Bloody Sunday when police were determined to prevent reoccupation.

Police moved Polly and other women to a workhouse, but she and 10 others escaped and returned to Trafalgar Square where they were formally arrested - Polly was drunk and "described by the arresting officer as having been the worst woman in the square."

The workhouse found Polly placement in 1888 with the Cowdrees, a religious teetotaler couple in Wandsworth - she wrote to her father: "It is a grand place with trees and gardens back in front. All has been newly done up. They are teetotalers and very religious. So I ought to get on."

Polly absconded from the Cowdrees, taking clothing worth just over three pounds - Mrs. Cowdrey wrote to the workhouse reporting the theft of work uniforms she'd provided.

Polly ended up at Wilmot's lodging house on Thrall Street in Spitalfields, an all-women DOS house where she shared a room with Ellen Holland and two others, sometimes sharing a bed to save money.

Ellen Holland told police she liked Polly but found her "quiet and withdrawn" - I imagine that there were many, many troubles in Polly's life by this point.

The Slippery Victorian Definition of Prostitute

Ellen Holland denied at the inquest that Polly was a prostitute, saying "she did not think the deceased was leading a fast life. In fact, she seemed very afraid of it."

Jerry White wrote: "No one knows how many prostitutes there were in London. Estimates varied from 8,000 to 80,000 and sometimes more. All these numbers were clueless... There were few objects of social inquiry that caused more muddle and dishonesty than the prostitute."

London Fog "any female who was kept by a man to whom she was not married" was labeled a prostitute - far broader than modern professional sex worker definition.

Polly had been recorded in the 1881 census living with another man after leaving her husband, which legally absolved William Nichols of financial responsibility and officially labeled her a prostitute.

Working-class women were "always desperate to keep hold of their marriage certificates, because in a sense, it's a testimony to their respectability" - without it, they risked the prostitute label.

Police used the phrase "common prostitute" to mean career prostitute - "it's evident that Polly was not that" though she may have resorted to selling herself when desperate for DOS money.

August 31, 1888: Polly's Final Hours

By August 30, Polly had somehow acquired money to buy a new bonnet trimmed with black velvet - "the one that Dr. Llewellyn will specify in his report" - but was broke again by evening.

Turned away from Wilmot's lodging house for lack of DOS money, Polly told the doorkeeper: "I'll soon get my DOS money. See what a jolly bonnet I've got now."

Instead of getting a bed, Polly went to the Frying Pan pub and got "even more drunk" - leaving around 12:30am heading south toward Whitechapel Road.

Ellen Holland encountered Polly at 2:30am on the corner of Whitechapel Road - "she was staggering, so drunk that when Ellen stopped her, Polly slumped against the wall."

Polly told Ellen: "I've had my lodging money three times today, and I've spent it. It won't be long before I'll be back" - refusing to return to Wilmot's without payment.

Ellen watched Polly stagger eastward along Whitechapel Road toward Bucks Row at 2:30am - "Ellen Holland is the last person to see Polly Nichols alive."

Discovery of Polly Nichols' Body on Bucks Row

Charles Lechmere, a carman heading to work at Covent Garden, found Polly's body around 3:40am on August 31, 1888 on Bucks Row near a yard crossing leading to a stable.

Another carman, Robert Paul, joined Lechmere - they found the woman lying on her back with skirts hitched over her hips, but couldn't bring themselves to examine closely in the darkness.

Lechmere told a policeman they encountered: "She looks to me to be either dead or drunk, but for my part, I think she is dead" - both carmen were late for work and hurried on.

A policeman on his beat had walked down Bucks Row just 30 minutes before the body was found and saw nothing - the killer worked with "incredible speed" in complete silence.

Mrs. Emma Green, who lived directly above the murder scene, was "a light sleeper" who insisted "had a scream been given, she would have heard it" - but heard nothing.

The Horrific Mutilations of Polly Nichols

Dr. Rhys Llewellyn's autopsy revealed Polly's throat was "cut almost from ear to ear" and her abdomen "savagely ripped open, exposing the intestines."

The stomach lining was "cut in several places" and there were "two small stabs on private parts, apparently done with a strong bladed knife."

Dr. Llewellyn confessed himself "appalled" by what he examined: "I have seen many terrible cases, but never such a brutal affair as this."

The killer must have been "covered with blood" yet vanished into early morning Whitechapel Road traffic unnoticed - possibly because blood-stained aprons were common near slaughterhouses.

The mutilations raised immediate questions about whether they "betrayed specialist knowledge" - relevant because Whitechapel contained both the London Hospital full of surgeons and numerous knackers' yards and slaughterhouses.

Identifying Polly: The Black Velvet Bonnet

Dr. Llewellyn described the victim as "a woman of small size" with brown eyes, dark complexion, and missing teeth - common features making identification difficult.

Polly's possessions were minimal and anonymous - "a comb, a looking glass, a handkerchief" - with shabby, stained clothing offering no clues.

The one distinctive item was her bonnet "made of black straw and trimmed with black velvet" - the new bonnet she'd proudly shown the doorkeeper hours before her death.

Ellen Holland identified the body within hours by the bonnet and their shared lodgings at Wilmot's DOS house on Thrall Street.

Police found Polly's petticoats stamped with the mark of Lambeth workhouse, leading them to an inmate who provided her full name: Mary Ann Nichols.

On September 1, William Nichols and Edward Walker (Polly's father) were brought to identify the body - William gazed at his mutilated wife and stammered through tears: "I forgive you as you are. I forgive you on account of what you have been to me."