In first-look photos, the army medic played by Michelle Keegan appears in uniform and looks to be being escorted away by two men, also dressed in camouflage clothing.
The description for the forthcoming episodes tease that Lane will find herself caught up in a kidnapping after heading to Northern Nigeria to assist local forces.
It also details that she will be recovering from the news of her former flame Elvis Harte’s death after he was dramatically killed off in the final episode of the Nepal tour on Tuesday night.
Our Girl series three - in pictures
“BBC One next year, alongside 2-Section and Special Forces as they are tasked in assisting local forces in Northern Nigeria when a group of school girls are kidnapped,” the description states.
“Heartbroken and grieving from the death of Elvis, Georgie tries to heal whilst on duty, however she is soon lured back to the front line and as the situation escalates, Georgie is thrown into jeopardy like never before.”
The third series of Our Girl consists of 12 episodes split into three blocks of four shows. The first has seen Lane and her 2-Section colleagues travel to Nepal on a disaster relief mission before heading to Afghanistan.
The second tour will take 2-Section to Nigeria, while the location of the third tour has yet to be named.
Our Girl: Nigeria Tour arrives on BBC One in 2018.
