The first trailer for Snowden, Oliver Stone’s biopic of whistleblower Edward Snowden was released on Wednesday, offering a glimpse of the forthcoming film that depicts Snowden’s entry into the National Security Agency (NSA), his 2013 release of mass surveillance documents, and his subsequent escape to Hong Kong.

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The film covers similar ground as Citizenfour, the 2014 documentary chronicling the fallout of Snowden’s revelations, which was directed by Laura Poitras, one of the journalists who helped report on the documents, along with Glenn Greenwald. Citizenfour received the Academy Award for Best Documentary in 2015.

All three are depicted in the film, which stars Joseph Gordon-Levitt as Snowden, Melissa Leo as Poitras, and Zachary Quinto as Greenwald. The film also stars Tom Wilkinson as Ewen MacAskill, the Guardian journalist who also traveled to Hong Kong to meet with Snowden and report on the leaks. 

In the trailer, Snowden is shown being discharged from the army due to an injury and subsequently joining the NSA to “help my country make a difference in the world.”