In 2011 , he played Thaal Sinestro , Green Lantern and Hal Jordan 's mentor , in the superhero film '' Green Lantern '' . Strong said the film " closely follows the early comics . Sinestro starts out as Hal Jordan 's mentor , slightly suspicious and not sure of him because obviously Hal is the first human being who 's made into a Green Lantern . He 's certainly very strict and certainly unsure of the wisdom of Hal becoming a Green Lantern . " Strong went on to state that the character " is a military guy but is n't immediately bad . It 's the kind of person he is that lends himself to becoming bad over the course of the comics being written , but initially he 's quite a heroic figure . " He also revealed that the outfit and other aspects of the character very closely follow the character 's early days . Also in 2011 , he voiced Pod in '' The Secret World of Arrietty '' and Captain Titus of the Ultramarines Chapter in the video game '' Warhammer 40,000 : Space Marine '' . The same year , and most notably , he played the role of Jim Prideaux in the film adaptation of '' Tinker Tailor Soldier Spy '' , which was earlier played by Ian Bannen in the iconic original 1979 BBC series starring Alec Guinness . The film premiered in competition at the 68th Venice International Film Festival on 5 September 2011
68th Venice International Film Festival
68th Venice International Film Festival
Mark Strong