Clark Johnson is an American-Canadian actor and director who has worked in television and film. He is known for acting as David Jefferson in Night Heat (1985–1988), Clark Roberts in E.N.G. (1989–1994), Meldrick Lewis in Homicide: Life on the Street (1993–1999), and Augustus Haynes in The Wire (2008). Also, Johnson directed episodes of The Wire (2008) and the films S.W.A.T. (2003) and The Sentinel (2006). He was born in Philadelphia, Pennsylvania.