Use the Single-Stage Booster Rockets to launch the cages of 8 Kezan Citizens or Goblin Survivors.
We really don't have time to rescue those that are incompetent enough to get themselves captured over and over. Still, since I have some extra rockets leftover, this problem should be a snap.
Take these single-stage booster rockets down into the Slave Pits to the north and put them on the cages.
The cage will lift off into orbit and those idiots will be freed.