‘Dexter’ Premiere: 5 Things You Should Know Before Watching Season 7 (GALLERY)

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Sharpen your knives and set up you kill room because Dexter is finally returning to TV.

Season 6 left off with a major cliffhanger as someone close to Dexter (Michael C. Hall) witnesses him committing a murder, finally uncovering his serial killer secret once and for all.

As the Showtime series starts up its second last season this Sunday, Celebuzz is recapping the top 5 things you need to know before the big premiere.

Launch the gallery above for your Dexter refresher. Warning: Contains spoilers if you haven’t finished season 5 yet.

As Celebuzz previously reported, Miami Metro Homicide is losing yet another detective this season.

Actor Billy Brown, who joined the show on Season 6 as Detective Mike Anderson – a sharply dressed transfer from Chicago with an impressive solve rate – will be departing the show, a source close to the production confirms exclusively to Celebuzz.

However, the word’s still out if the detective will be transferring back to the Windy City, or leaving the old fashioned way — by getting killed off.

The new season of Dexter premieres on Sunday, Sept. 30 at 9 PM on Showtime.