It's a race against time as Georgie's suspicions about Omar simmer and attacks on election day ramp up.

Georgie fears her army career is over after painful sessions with the psychiatrist. So when she makes a shocking discovery about Omar, will she do the right thing?

2 Section's rescue mission has devastating consequences, leaving Georgie's future in the army hanging in the balance. Elsewhere, Monk struggles with his own grief, Mimi's worried by the arrival of an old acquaintance, Cheese; and Sandy tries to be a leader for his mourning platoon.

Georgie unearths vital intelligence that sends 2 Section on a dangerous mission to rescue Dr Bahil.

Trying to shake off her resurging grief for Elvis, Georgie leads efforts to support a risky medical outreach program.

As 2 Section prepares to return to Afghanistan, Georgie must decide whether to join them, kicking up difficult memories for her.