My one soldier who carries an arc caster just got mind controlled by the enemy. I would really like to capture this enemy rather than kill it, as I suspect I could learn a lot from it. How can I make it stop mind controlling my soldier without killing it?
Mind Control wears off after 4 turns, what I did was run all my units way back out of LOS then every turn tab through my guys until the mind controlled unit was back under my command.
This is the only way if you don't want to kill the enemy. There is no way to break mind control other than kill the controller. Panicing him does not free the victim, and you can not mind control neither the controller nor the controlled guy during the duration of the link.
Lacking another tazer, your only option to save the solider is to kill it. Not sure what happened in your game, but killing the controller will not kill a mind controlled solider (unlike when enemies link).
Killing/stunning is the only option. As per Shykin's comments, there is nothing in the psi tree to free a mind controlled soldier.
I tried arcing the guy under mind control (the first time it happens in the game) and you can't do it - no target.
The soldier doesn't die when the link is broken and you get more of the pink commander aliens in the next mission to capture so no great loss if you just kill the commander there.
You may be able to zapp the alien commanders instead but I didn't try it.