How HBO's The Sympathizer ended up with a showrunner with two faces: Don McKellar and Park Chan-wook

Open this photo in gallery: LOS ANGELES, CALIFORNIA – APRIL 09: (L-R) Don McKellar, left, and Park Chan-wook attend the Los Angeles Premiere of HBO Original Limited Series The Sympathizer at The Paramount LA on April 9 in Los Angeles.Emma McIntyre/Getty Images "I am a spy, a sleeper, a spook, a man of two faces." The opening line of The Sympathizer by Viet Thanh Nguyen - the 2015 Pulitzer Prize winner about a Vietcong double agent acting as a mole within a South Vietnamese refugee community in Los Angeles - is certainly a contender for one of the most compelling…