The sophomore season of the hour-long drama premieres Sept. 30 at 10 PM (PT/ET) with new episodes to continue in the same weekly timeslot. Check your local listings.

Based on the Jeff Lindsay novel "Darkly Dreaming Dexter," the series "follows Dexter Morgan (Hall), an incredibly likeable forensics expert for the Miami Metro Police Department, who moonlights as a serial killer with a penchant for inflicting his own unusual brand of justice – he kills people who truly deserve it," according to show notes.

Joining Hall and Carradine in the cast of "Dexter" are regulars Jennifer Carpenter (The Crucible, "The Exorcism of Emily Rose") as Hall's policewoman sister Debra, Lauren Velez (Intimate Apparel, "New York Undercover") as his boss, David Zayas (Anna in the Tropics, Our Lady of 121st Street) as a fellow homicide detective and James Remar (Bent, California Dog Fight, "Sex and the City") as his ex-cop adoptive father. Julie Benz, C.S. Lee and Erik King also appear.

Hall, last seen Off-Broadway in Mr. Marmalade, is known for his Emmy Award-nominated turn as David Fisher in the HBO series "Six Feet Under," a role he landed right after his Emcee duties in the Broadway revival of Cabaret. The actor did a stint on Broadway in Chicago and has also appeared onstage in Skylight, Corpus Christi, The English Teachers, Cymbeline, Macbeth, Henry V, Timon of Athens, Romeo and Juliet, Much Ado About Nothing and Camelot.

Carradine took over the role of Lawrence (originated by John Lithgow and assumed by Jonathan Pryce in the interim) in the Broadway musical Dirty Rotten Scoundrels. The actor — seen on HBO's "Deadwood" as Wild Bill Hickock and CBS' "Criminal Minds" — has also appeared on Broadway as the title character in The Will Rogers Follies and President George W. Bush in the American premiere of Stuff Happens in Los Angeles. Other credits include Foxfire, Hair and Wake Up, It's Time to Go to Bed. For more on "Dexter," visit the Showtime official website at sho.com.