This trailor markets "Tinker Tailor Soldier Spy" to it's target audience. As the film is mainly targeted towards the European market, the trailer focuses on European aspects of the film, such as the A-list European actors. There is quite a lot of time in the trailer which is devoted to images of the actors, or their names (e.g. Gary Oldman and Tom Hardy). The trailer also mentions the talented European film-maker, Tomas Alfredson. As well as this, the plot has a lot of focus in this trailer. The narrator clearly describes the plot, and a lot of effort is put into making it sound as dramatic as possible, while it is accompanied by suitably dramatic shots that strengthen that focus on the spy/secret agent storyline.
In addition, the sound plays a very important role in this trailer. Tense, dramatic music is used that feels like it is building up to an event. This, along with the aforementioned narration and film clips, really makes the trailer feel like it is building up to a climax. As the trailer does not give you the answer to the mystery (obviously), you want to go and see the film to find out what happens.