The Showtime serial killer drama starring Michael C Hall and Jennifer Carpenter returns in the US on Sunday, September 30 from 9pm ET.
The promo art labelled 'He saw. She saw.' teases the fallout from the dramatic end to the previous season.
Dexter exec Sara Colleton previously spoke about the new episodes, explaining that "everyone's plot is thickening".
Yvonne Strahovski, Jason Gedrick and Ray Stevenson are among the new additions to the cast for the upcoming run.
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Watch a two-minute sneak peek at Dexter season seven below: