
Described as "an attractive former finance executive looking for a quieter life," Lenz's character, Cassie, is slated to debut in the season's fourth episode and will wind up moving in next door to Dexter. While it's doubtful she will actually find life so close to a serial killer to be peaceful, we have a sneaking suspicion that her arrival will shake things up for Dex as he and Deb continue to pass themselves off as normal, non-homicidal, slightly-incestuous siblings.
Source: TV Guide
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