'Citizenfour' Trailer Reveals Edward Snowden Clip and Secret Emails

The documentary received a lot of buzz after premiering Friday at the New York Film Fest

The first trailer for the Edward Snowden documentary Citizenfour gives a peek at what is revealed in the highly anticipated film.

The teaser trailer begins with a voiceover of emails that were sent to director Laura Poitras about the National Security Agency from someone identified only as "Citizenfour."

The sender was later revealed to be Snowden, who is shown introducing himself in the clip. 

Read more New York Film Fest: 'Citizenfour' Hacks Way to Top of Uber-Competitive Doc Oscar Race

Citizenfour, which premiered Friday at the New York Film Festival, has received attention for revealing that there was a second whistleblower.

RADiUS-TWC releases the film Oct. 24.