Donnie Darko director Richard Kelly has said he received one key piece of advice from Christopher Nolan ahead of the film’s release that made the time-travel classic easier to follow.Kelly’s 2001 film reached its 20th anniversary this week (January 19), and to celebrate the landmark Kelly took part in a new oral history of the film.In the piece published on The Ringer, Kelly said that it was Nolan and his wife Emma Thomas’ idea to include the parenthetical title cards below the date every time