Sometimes it’s better to be careful when moving around as walkers could be hiding just around the corner.
Survivors that have
any Action Points left at the end of your turn will go into Overwatch mode. This means that your survivor will attack the nearest enemy in their zone of control they can without moving.
Damage done in Overwatch is 50% of the survivor’s base damage. In addition, ranged Overwatch attacks don’t generate any threat.