Sweeney Todd is a fictional character who first appeared as the villain of the Victorian penny dreadful The String of Pearls (1846–47).
The tale became a staple of Victorian melodrama and London urban legend, and has been retold many times since, most notably in the Tony award–winning Broadway musical by Stephen Sondheim and Hugh Wheeler.
Claims that Sweeney Todd was a historical person are strongly disputed by scholars, although possible legendary prototypes exist.
In the original version of the tale, Todd is a barber who dispatches
his victims by pulling a lever as they sit in his barber chair. His
victims fall backward down a revolving trapdoor into the basement of his
shop, generally causing them to break their necks or skulls. In case
they are alive, Todd goes to the basement and "polishes them off"
(slitting their throats with his straight razor).
In some adaptations, the murdering process is reversed, with Todd
slitting his customers' throats before dispatching them into the
basement through the revolving trapdoor. After Todd has robbed his dead
victims of their goods, Mrs. Lovett,
his partner in crime (in some later versions, his friend and/or lover),
assists him in disposing of the bodies by baking their flesh into meat pies and selling them to the unsuspecting customers of her pie shop. Todd's barber shop is situated at 186 Fleet Street, London, next to St. Dunstan's church,
and is connected to Mrs. Lovett's pie shop in nearby Bell Yard by means
of an underground passage. In most versions of the story, he and Mrs.
Lovett hire an unwitting orphan boy, Tobias Ragg, to serve the pies to customers.
Link to the review by The Morning Call here