Focusing on Nicholas Brody's (Damian Lewis) new career in politics, the promo blends together footage from season one with clips from season two.
Lewis's co-star Clare Danes also features in the clip as CIA operative Carrie, alongside Morena Baccarin and Mandy Patinkin as Brody's wife Jessica and Carrie's mentor Saul respectively.
Executive producer Howard Gordon has teased that the second season will focus more on the "tragic love story" between Brody and Carrie, while Lewis has suggested that Carrie will "have an upper hand" over Brody.
A set of new images from season two have also been released, again focusing on Brody, Carrie, Saul and Jessica.
voted for Homeland as the most deserving winner of this year's 'Best Drama' Emmy award, for which it is nominated alongside shows including Mad Men, Breaking Bad and Downton Abbey.
The second season of Homeland will debut on Showtime in the US on September 30, with a UK airdate on Channel 4 yet to be announced.
> 'Homeland' debuts new season two promo: 'Look Again'
Watch Lewis discussing the show with Digital Spy below: