David Slack is an American animation and television writer and producer. He has written and/or produced on such shows as Law & Order, Lie to Me, In Plain Sight, Teen Titans, Hi Hi Puffy AmiYumi, Jackie Chan Adventures, Generator Rex, Transformers: Prime, and more recently, Person of Interest, A.P.B., and the 2016 reboot of MacGyver.As of 2011, he is currently involved in producing and writing a new science fiction TV series for Syfy called Seeing Things.In a 2012 interview with the Penmen Review, a Southern New Hampshire University newspaper, he explained that, when writing, he begins with the story, not the characters, and builds it along the way. Later that month, in another interview with givememyremote.com, he revealed how Person of Interest producers Greg Plageman and Jonathan Nolan "like to keep the audience guessing" and that the writers also "like to take the show in surprising places".In 2019, Slack joined other WGA members in firing his agents as part of the guild's stand against the ATA and the practice of packaging.