Cooke played Louis Greene, a lab tech and Masuka's intern, in seasons six and seven, and Darri Ingolfsson played Oliver Saxon in season eight. Crew The main creative forces behind the series were executive producers Daniel Cerone, Clyde Phillips, and Melissa Rosenberg. Cerone left the show after its second season. Executive producer and showrunner Phillips departed the series, after a record-setting season-four finale, to spend more time with his family; 24 co-executive producer Chip Johannessen took over Phillips' post. Head writer Melissa Rosenberg left after season four, as well. After the conclusion of season five, Chip Johannessen was revealed to be leaving the show after a single run, and Scott Buck would take over as showrunner from season six onward. Production Exterior filming Although the series is set in Miami, Florida, many of the exterior scenes are filmed in Los Angeles and Long Beach, California. Many landmark buildings and locations in Long Beach are featured throughout the series. The finale episode's airport scene takes place at Ontario International Airport in Ontario, California. Marketing In preparation for the United Kingdom launch of the series, Fox UK experimented with an SMS-based viral marketing campaign. Mobile phone owners received the following unsolicited SMS messages addressed to them by name with no identifying information other than being from "Dexter": "Hello (name). I'm heading to the UK sooner than you might think. Dexter." The SMS message was followed by an email directing the user to an online video "news report" about a recent spree of killings. Using on-the-fly video manipulation, the user's name and a personalized message were worked into the reportthe former written in blood on a wall near the crime scene, the latter added to a note in an evidence bag carried past the camera. While the marketing campaign succeeded in raising the profile of the show, it proved unpopular with many mobile owners, who saw this as spam advertising aimed at mobile phones. In response to complaints about the SMS element of the campaign, Fox issued the following statement: Reception Critical reception Although reception to individual seasons has varied, the overall response to Dexter has been positive. The first, second, fourth, and seventh seasons received critical acclaim, the third and fifth seasons received generally positive reviews, while the sixth and eighth seasons received mixed to negative reviews. While remarking on some of the show's more formulaic elements (quirky detective, hero with dense