Showtime’s Dexter and Homeland delivered more record-breaking ratings Sunday with their season finales. Dexter’s seventh-season ender drew 2.75 million viewers at 9 PM, the highest-rated episode ever for a Showtime original series. That’s up 23% from the original Season 6 finale for the serial killer series. Overall, Dexter had a Sunday audience of 3.43 million viewers on the night. Meanwhile, Homeland’s 10 PM broadcast of its second-season finale drew 2.3 million viewers, down from last week’s high of 2.36 million. Overall, the spy thriller series had its highest-rated night ever with a total of 2.7 million viewers. The first airing of the Season 1 finale had an audience of 1.7 million viewers last season.