Julian Sands

The eighth and final season of Dexter is beefing up on guest stars.

Showtime confirms Dexter Season 8 will be the final season

TVGuide.com has learned exclusively that 24 villain Julian Sands will appear on Dexter. Sands, whose TV credits also include Smallville, Castle and Person of Interest, will play Miles Foster, a wealthy international businessman. Further details on his role are being kept under wraps.

Last week, Showtime confirmed that Dexter's eighth season will be its last. The final season will include appearances by Yvonne Strahovski, Darri Ingolfsson, Charlotte Rampling and Sean Patrick Flanery, among others.

Could there be a Dexter spin-off?

Check out a sneak peek of the season, which premieres Sunday, June 30 at 9/8c on Showtime:

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