Bill Condon‘s WikiLeaks movie The Fifth Estate debuts in Toronto which kicks off today. The helmer will next turn to A Slight Trick Of The Mind, reteaming with his Gods And Monsters star Ian McKellen. McKellen will play a retired Sherlock Holmes who is haunted by a 50-year-old unsolved case. Based on a novel by Mitch Cullin, the screenplay is adapted by Jeffrey Hatcher (The Duchess). Icon UK’s production arm AI is financing and co-producing. BBC Films is also co-financing. Shooting gets underway in the UK next April. Anne Carey is producing via Archer Gray Productions. The King’s Speech producers Iain Canning and Emile Sherman of See-Saw Films; Icon/AI Film’s Aviv Giladi; and Len Blavatnik, whose Access Industries owns the Icon UK group; and BBC Films’ Christine Langan are exec producing. FilmNation is handling international sales. Condon is repped by WME, Anonymous Content, Wayne Alexander and Robert Nau. McKellen is repped by Chris Andrews at CAA and Paul Lyon-Maris at Independent Talent Group.