According to TBO.com
Some things to look for in the coming episodes include: more about Hurley’s past, the return of Michael Harold Perrineau Jr.) and Walt (Malcolm David Kelley), a guest role for Robin Weigert (Calamity Jane on “Deadwood”) and more about castaways Nikki (Kiele Sanchez) and Paulo (Rodrigo Santoro).
So maybe we’ll see them in the season finale?