From director Stephen Frears and playwright James Graham, the limited three-part series Quiz (airing on AMC) tells the outrageous and unbelievable story of how former British army major Charles Ingram (Matthew Macfadyen) and his wife Diana (Sian Clifford) caused a scandal after being caught cheating their way to winning £1 million on the quiz show Who Wants to Be a Millionaire? The couple, along with an accused accomplice who was sitting in the audience, stood trial for conspiring by coughing to signal the correct answers, and left everyone questioning what really happened. During this 1-on-1 phone interview …