Teen Wolf's Sheriff Stiliski is not suffering the after effects of a simple chimera attack.

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Stiles' (Dylan O'Brien) dad ended "Status Asthmaticus" in a pool of blood, and the single father will be in mortal danger when season 5B premieres. Although there have been assertions that it was The Beast, it is unknown who (or what) actually attacked the Sheriff (Linden Ashby). All we do know is that Scott (Tyler Posey) and Stiles will have to team up once more as they learn that blood loss is not Stilinski's only concern.

"Scott and Stiles try to learn what is behind the mysterious infection that is killing the town sheriff in spite of their deep rift," MTV said of "The Last Chimera," according to Spoiler TV.

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If the former BFFs do manage to crack the code, that doesn't mean bygones will be bygones. As the story rolls into episode 12, Scott will be just as alone as he was in the last minutes of the midseason finale.

"Even without the support of his pack, Scott considers what the Dread Doctors' success means for Beacon Hills," reads the synopsis for "Damnatio Memoriae (Condemnation of Memory)."

Find out what's next Scott's pack when Teen Wolf returns to MTV on Jan. 5 at 9 p.m. ET.