Credit: Gene Page/AMC Photo: Sasha Peers Outside in The Walking Dead Season 4, Episode 2: “Isolation”

It’s not looking good for Tyreese, you guys. Just one episode after losing his gal pal Karen in some bizarre burning incident (Tyreese found Karen’s charred body outside the prison when he went to check on her) it looks like he might be forced to say goodbye to someone else close to him in the next installment, The Walking Dead Season 4, Episode 3: “Isolation”.

The below sneak peek shows a clearly ill Sasha, Tyreese’s younger sister, on the hunt for this mysterious Dr. S. After coughing way too close to Hershel’s face (cover your mouth, girl!) Sasha makes her way inside to find the doc.

After walking past another person coughing up blood (ew) Sasha continues to head further into the prison, shouting for Dr. S., but she stumbles upon something unexpected.

To see just how sick Sasha is, watch the sneak peek for yourself below!

The Walking Dead Season 4, Episode 3: “Isolation” airs on October 27 at 9 p.m. ET on AMC.