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“Sherlock and Daughter,” a paternal twist on the Holmes legend and a new adaptation of Agatha Christie’s “Towards Zero” debut on the CW and BritBox, respectively.

The CW is under new ownership but still set on capturing the tween and 20-something audience that has long been its meat and mead – not a simple task in an entertainment environment friendlier to franchises than original concepts.

Wednesday brings two new series, the Christie adaptation “Towards Zero” on BritBox, and an original Holmes adventure, “Sherlock & Daughter,” on the CW.

In retrospect, the heyday of YA coincided with the golden age of the CW, which always seemed to have a dozen adaptations of YA novels in development at any given moment.

Smith, who created the “Vampire Diaries” book series that inspired the CW drama of the same name and contributed to pop culture’s obsession with vampires, has died.