Question: Who did John Heffernan portray in the British crime drama programme starring Idris Elba?
Sentence (from "Molly's Game"): Molly's Game is a 2017 American crime drama film written and directed by Aaron Sorkin in his directorial debut, based upon the memoir "Molly's Game: From Hollywood's Elite to Wall Street's Billionaire Boys Club, My High-Stakes Adventure in the World of Underground Poker" by Molly Bloom.
Relevant evidence: No