Who: Katherine/Wren/Derek.
What: Katherine leaves some voice messages.
Wren:"Remember how shit went down? Shit's no longer down. Mostly. Anyhow, you're entirely too good on stage, but I'm tired of melting into crowds."
Derek:"Hope you remember this voice. Listen, I caught a whiff of your girl through my channels. Collared someone she turned, but... Between how they were all numb-like and the trail suddenly going cold, my guess is Veronica's churning up daisies for good."