A new, albeit brief, teaser promo for Showtime's seventh season of its hit series 'Dexter' has appeared online courtesy of the studio. Michael C. Hall and Jennifer Carpenter ('Quarantine') are back as Dex and Deb respectively for a seventh time and are surely going to have to deal with some extreme relationship hurdles following the shocking end to season 6. 'Dexter' season 7 is back on US screens on Sunday 30 September at 9:00pm ET/PT and regular 'Dexter' players C.S. Lee, James Remar, Lauren Vélez, David Zayas and Desmond Harrington ('Ghost Ship') all return. Check out the new teaser below.