The 20 or so surviving "redshirts" from oceanic 815 who didnt have speaking roles, the ones jack promised to rescue and come back for in season 4(?), the ones that were with sawyer on the beach in the time flash and got shot at, where are they????
They're kind of central to the whole oceanic 6 plot, and to the show as a whole, and theyve disappeared since the begin of season 5.
I always thought that the Latina extra who they focused on a lot but never spoke would finally have a role towards the end ala nikki and paolo, but she has completely vanished.