'Big Sky' Episode 5 Spoilers: Who will Legarski bludgeon to death, Ronald's mother or Merrilee?

Things are heating up on 'Big Sky'. In the previous episode, Cassie Dewell (Kylie Bunbury) and Jenny Hoyt (Katheryn Winnick) decide to get to the bottom of the Legarski mystery once and for all, and that involves, of course, going undercover as a prostitute. They come agonizingly close to where the missing girls are hidden, but of course, they don't hear their shrieks and screams. They leave. The girls are not in the pink of health, least of all Grace (Jade Pettyjohn) who was shot in the leg by Legarski (John Carroll Lynch) in the previous episode. Grace's leg develops an infection while Legarski and Ronald Pergman struggle to cure it without involving a doctor.
However, there are rifts emerging between Legarski and Ronald. Legarski is furious that Ronald's bizarre mother is getting suspicious, and is almost ready to draw the gun on Ron. Ron doesn't seem to be making things better for himself, he goes off dancing with Legarski's wife. The woman is sad her husband is not giving her attention, and is ready to have an affair with the next man she sees. In the promo for the mid-season finale, we see Legarski losing his cool and ready to bludgeon his death. That could just be his wife Merrilee, or maybe Ronald's mother.
The synopsis for the next episode reads, "Jenny and Cassie feel as if they’re closing in on Legarski, but they are racing against the clock as he and Ronald are preparing to move the girls. Jerrie makes one last attempt to convince Ronald to let them go. Elsewhere, Cassie visits Merilee to question her about her husband and Ronald aggressively confronts his mother”.
One thing we know for sure, a major character is going to die, as the show enjoys its jaw-dropping scenes. In the first episode itself, Cody Hoyt (Ryan Phillippe) was shot dead by Legarski and that came as a real shocker for fans, who thought that he would be the lead for the series. Executive producer Ross Fineman opened up about director David E. Kelley’s approach: "David likes to say that people will come for the thriller and stay for the characters. And when our characters are in jeopardy, people will care even more."
Well, who is going to die now? 'Big Sky' airs on ABC, Tuesdays at 10 pm.