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David E. Kelley
David Edward Kelley (born April 4, 1956) is an American television writer, producer, and former attorney. He has created and/or produced a number of television series including Doogie Howser, M.D., Picket Fences, Chicago Hope, The Practice and its spin-off Boston Legal, Ally McBeal, Boston Public, Goliath, Big Little Lies, and Big Sky. Kelley is one of very few screenwriters to have created shows that have aired on all four top commercial U.S. television networks (ABC, CBS, Fox, and NBC) as well as cable giant HBO.
Source: Wikipedia