Keith: Pidge pulled it off.
Hunk: I tough the little guy all the tricks.
The husky slaver robot showed that behind the round circular disk on the chest of some of Zarkon's robots exists a short range internal stun gun, the red disk splitting down the center and retracting to the left and right. Whether the gun has a kill setting or not is unknown.
It is shown that Zarkon's robots have a Primary Circuit and a Secondary Circuit to help them decide on a course of action. A split decision between the two, eg. one Circuit saying "Yes" and the other saying "No", gives the robots the appearance of free choice by allowing them to choose which one to go with.
Pidge has a kid sister back on the planet Terra.