I loved this episode!! Oh the theories...
At this point I think its safe to say that at least someone from the colony raid made it out safely and is calling on the SAT Phone. I think its very unlikely that anyone else would be calling. The phone with the memory is with Glenn and I think the time is too short for Scratch to torture it out of anyone. So unless Glenn and/or Pete actually were working for the Mallers and brought the phone back to the colony, it'll be a friendly on the other line. My bet is that its Victor on the other line. If Saul gets to Lizzy, she'll likely tell him about Bert so they'll try and free him. I'm betting CJ will be coordinating the arming and revolt of the slaves and finding those responsible for killing Sean. That leaves Vic to get the SAT phone parts back to Glenn so they can fix it and call in for reinforcements.
I very much doubt that everyone made it out of the colony. I'm thinking someone got left behind so the ones who made it scrambled to fix the phone and call Michael. The good news is he'll have more of an excuse to go and save whoever was left at the when he tells Kimmet that he found a place to put the Boulder refugees. They might even consider abandoning Irwin and falling back there since a nice hoard of little ones soon will be knocking on their door.
I think chapter 35 will be a mix of picking up where we left off at the colony and reconnecting with Pegs and Kelli. This will catch us all up on everyone and will set up the finale: the Michael led take over of the colony.