On Lizzie's recording, it sounded like after a few growls, the zombie said, "move."

I really was stunned the whole time Bert and Angel were trapped in the room. I imagined the scene ending with Bert and Angel using the C4 to blow themselves sky high, along with a good number of biters. My hands were sweating up until the point that I heard Riley say the C4 was downstairs. That made me relax a bit. I imagine Riley and Kalani will make thier way to the chopper and use it to rescue Angel and Bert (or atleast one of them). Is the length of two bed sheets enough to make a rope to throw at a nearby helicopter?

As far as Lizzie goes, I'm afraid to say it, but I believe she, along with Bricks, Tardust, Scratch and who knows who else, are on thier merry way to the Colony. That's where Durai was headed. So now that Mission: Disturb Hornets Nest is complete they would most likely be on their way to meet up with the other half of the mallers. And by the sound of the recording, it doesn't appear that Lizzie and the others were captured. All's I got to say is, poor Saul.