Esteemed journalist and author David Walsh will forever be renowned for being the man who exposed one of the greatest scams in sports history. He was the man who, in the face of adversity, never gave up on revealing the truth about Lance Armstrong, and his efforts have since been turned into a movie; The Program.

With Chris O’Dowd playing Walsh, we asked the journalist about how surreal it is to see himself portrayed on the big screen. He also explained why he felt disappointed in Alex Gibney for the documentarian’s feature The Armstrong Lie.

The Program is released on October 16th.