"A training mission with a new recruit goes horribly wrong, sidelining the team just as Hector's killer is found. Jonas coaches his daughter Betsy on how to respond to media questions about her kidnapping and rescue without blowing the cover story."

"Chlorine gas is used in an attack on the town, leaving Tiffy to save herself. Her students, Mack and Bob must secure the apartments while Charles is stranded on the road. Sam and Jonas desperately try to locate the source before all the oxygen is gone."

"The Unit is sent in to rescue an old friend and finds themselves in trouble. On the home front, Tom finds a lead in a terrorist attack and implements some extreme measures to get the information from a suspect."