Clark Johnson is an American actor and director. He has directed and performed in the series Homicide: Life on the Street, The Wire and Homeland, as well as the Amazon comedy Alpha House. Clark has also directed episodes of Sleeper Cell, The Walking Dead, The Shield, Memphis Beat and Lights Out. His feature film directing credits include S.W.A.T. (2003) and The Sentinel (2006). His 2020 film, Percy (starring Christopher Walken), was shot in Manitoba, Canada.