Sam fears for his family's safety when his wife is called to resume a former CIA cover after a case suggests ties to the infamous Sidorov and his stolen nukes. Aunjanue Ellis guest stars.
A serial killer who targets random victims in highly visible places to create a sense of public fear is the subject of a BAU investigation.
Katara sets out to confront the Fire Nation soldier who killed her mother.
Sokka and Zuko head to the Fire Nation's most heavily guarded prison -- the Boiling Rock -- in hopes to find and break-out the captured invasion force.
When it comes time for Zuko to teach Aang Firebending, it turns out Aang is not the only one who needs a lesson.
When our gang regroups at the Western Air temple, they find someone there they weren't expecting.
With the day of the eclipse upon them, the kids -- along with a rag-tag force of old friends -- enact their long-planned invasion of the Fire Nation.
The kids investigate mysterious disappearances in a spooky town. Katara makes a special connection.