Actress Yvonne Strahovski has joined the cast of Showtime's "Dexter." Strahovski, who will appear in a multi-episode story arc in the upcoming seventh season, will play the role of Hannah McKay, a strong, independent woman with a past that she's struggled to put behind her. As a turn of events leads Miami Metro Homicide to ask for her help in solving some old cases, Dexter works with her and begins to wonder if there's more to this woman than she's professed.

Production on season seven began last week and will premiere on Showtime on Sunday, September 30th at 9 p.m. ET/PT.

Yvonne Strahovski is best-known for playing CIA operative "Sarah Walker" on NBC's long-running action-comedy "Chuck," from executive producers Josh Schwartz and McG. Up next, she co-stars in two films: Guilt Trip opposite Barbara Streisand and Seth Rogen; and as the female lead in I, Frankenstein with Aaron Eckhart. She also starred in the 2011 Toronto Film Festival darling Killer Elite.

"Dexter" stars Michael C. Hall as a complicated and conflicted blood-spatter expert for the Miami police department who moonlights as a serial killer. The show also stars Jennifer Carpenter, Desmond Harrington, C.S. Lee, Lauren Vélez, David Zayas, and James Remar.