According to The Hollywood Reporter, DiCaprio and Scorsese are adapting Erik Larson's bestselling 2003 book, The Devil in the White City, into a TV series for the streaming service. The book recounts the true story of Daniel H. Burnham, the genius architect behind the 1893 Chicago World's Fair, and how his incomparable world showcase would intersect with that of serial killer H.H. Holmes (real name Herman Webster Mudgett), a doctor who committed heinous crimes just blocks from the massive fair grounds. The book chronicles a fictionalized account of H.H. Holmes, who is regarded as America's first serial killer.
There has been no word yet as to whether DiCaprio will be in front of the camera for the series. An earlier adaptation of the story was in the works from Tom Cruise, but fell out of development in 2004. Scorsese signed on to direct in 2015. Scorsese told the Toronto Sun back in 2016. "They want me to start again in January and see if we can find a way because it's an extraordinary story".
Martin Scorsese (who was attached to direct and produce) and Leonardo DiCaprio (originally on to star and produce) are still involved, though the announcement only now lists them as executive producers, though they may still take more active roles if they like what the show becomes. Paramount Television will also be producing and Billy Ray will be penning the script.
And in addition to the Holmes project, they are collaborating on an adaption of The Lost City of Z author David Grann's Killers of the Flower Moon: The Osage Murders and the Birth of the Federal Bureau of Investigation.