At the end of Dexter‘s last season, Deb (Jennifer Carpenter) discovered a few things about her brother Dexter (Michael C. Hall) — namely that he’s a killer.

So what happens next? Judging from this first still it doesn’t seem as if Deb is too pleased.

“Viewers might think we shy away from that moment of Debra walking in and seeing Dexter stabbing into Travis’ chest, but it’s just the opposite,” says executive producer Scott Buck.

“She now has to deal with what she’s seen and what she knows. And it forces him to defend and define himself.”

“Dexter” returns on September 30th.