Joseph William "Joe" Locke portrayed William Kaplan in Agatha All Along.
He also portrayed Billy Maximoff/Wiccan in possession of William Kaplan's body in Agatha All Along.
He performed the song "Ballad of the Witches' Road (Cover Version)" with Kathryn Hahn, Sasheer Zamata, Ali Ahn, Patti LuPone, and Aubrey Plaza in the Agatha All Along episode If I Can't Reach You / Let My Song Teach You.
He was interviewed for the Assembled special The Making of Agatha All Along.