Mind Control has a 5 turn cooldown.

If successfully initiated, Mind Control allows the psionic unit, "the Mind Controller", to gain temporary control of non-robotic enemies for four turns; first "turn" is counted when the Mind Control takes place and the enemy unit isn't allowed to act, making for only three actual turns in which the Mind Controller can make the enemy unit perform actions. When the turns elapse or the Mind Controller in question is killed any Mind Controlled unit will return back to the original owner's control.