Below is a feature breakdown of that episode, along with a few other shows that share the same title (though different season/episode numbers).
Many TV shows have an episode titled but if you're looking for Season 3, Episode 2 , you are likely referring to the sci-fi series Falling Skies , which aired this episode in June 2013. [S3E2] Collateral Damage
At the end of the episode, Maggie finds Hal sleepwalking into the woods, seemingly in a trance controlled by the enemy. Other Shows with "Collateral Damage" Episodes Below is a feature breakdown of that episode,
In this episode, the resistance continues its struggle against the Espheni invaders with the help of their new alien allies, the Volm. Other Shows with "Collateral Damage" Episodes In this
The Volm identify a nuclear power plant that provides fuel to Espheni weapons and Mechs. Tom Mason enlists an agoraphobic nuclear specialist, Dr. Roger Kadar (played by Robert Sean Leonard), to help destroy the facility without causing a radiation leak.