Petrocelli insists on following Roback, Davis and Alvarez on their unauthorized mission into Taliban territory, and Colonel Austin prepares for a confrontation with SecCorp.

The gang discovers the solution to many of their problems, but getting their hands on it won't be easy. Holloway gets a surprise visit. Davis struggles with a major decision.

Roback and Davis simultaneously navigate a minefield and a rift in their friendship, Holloway finds a way to help Qasem's village, and Colonel Austin gets SecCorp's attention.

A visiting dignitary arrives on base; Davis seeks a new side hustle as pressure from home becomes unbearable; Durkin and Sasquatch have a fight about their future.

Col. Austin comes down hard on Roback, Davis, and Alvarez. Davis brokers the big fight with Sasquatch. Qasem helps Holloway with her medical clinic.

A coordinated attack catches the base by surprise. Davis and Roback stumble upon an unusual operation in the Afghan hills. Alvarez helps Hazara.

Alvarez and Roback adjust to cohabitating, a communications blackout comes at a bad time for Davis, and Holloway proposes a plan to extend her deployment.

Roback, Davis, and Alvarez go on a mission to find Qasem. Alvarez makes an unexpected friend. Roback opens up to Durkin, and tries to salvage the fight with Sasquatch.

Roback, Davis, and Petrocelli make their way back to base through treacherous desert. Roback makes a grand gesture to help out Alvarez, complicating things with Durkin. Holloway takes a special interest in one of her patients.

Roback faces disciplinary action, Alvarez deals with trauma on the job and learns shocking news from home, and Roback and Davis's money-making scheme doesn't go as planned.