The action drama - starring Philip Winchester and Sullivan Stapleton - will return to Sky1 in September.
Underworld: Rise of the Lycans star Rhona Mitra has joined Strike Back for the ten new episodes, playing Captain Rachel Dalton.
After a long stint in North Africa, Dalton will take over as the new head of British military unit Section 20, following the demise of Colonel Eleanor Grant (Amanda Mealing) in the series two finale.
The third season of Strike Back - subtitled Vengeance - will again be co-produced by Sky, Cinemax / HBO and Left Bank Pictures.
> 'Strike Back' renewed for third series by Sky1 and Cinemax
Watch Digital Spy's interview with the cast of Strike Back below: