It's about that time to start speculating which hot star will join Michael C. Hall, Jennifer Carpenter, Lauren Velez, James Remar, C.S. Lee, David Zayas and the rest of the cast of Dexter for the upcoming seventh season, only to inevitably die in the finale after the season has neatly wrapped up his nefarious arc.

The producers already revealed that Yvonne Strahovski (Chuck, Gone) and Ray Stevenson (Thor, Kill the Irishman, The Book of Eli) signed on for Dexter roles this season, and now Chilean actor Santiago Cabrera (Heroes, Hemingway & Gellhorn, Alcatraz, Merlin) has joined up with the crew, adding his name to a list of guest stars that includes Jimmy Smits, Edward James Olmos, Colin Hanks, Mos Def, Julia Stiles and John Lithgow.

Cabrera will play the enigmatic author of investigative true crime novels, reports EW. Doubtless he'll get close to uncovering Dexter's secret.

Dexter returns to Showtime on September 30 with it revelatory season premiere, entitled "Truth Brings Light."

For more on Dexter:

WATCH: New 'Dexter' Season 7 Teaser Confronts Moment Of Truth

SPOILERS: 'Dexter' Will Return With 'Rome' Star Ray Stevenson

Uinterview | Reviews: Dexter – Season 5

Uinterview | News: SPOILERS: Dexter Season 6 Secrets Revealed

RECAP: Dexter Season 6 Premieres On A Lighter Note

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