Lowry calls on a young jihadi to unleash the deadly gas in a busy airport, while Reynolds is forced to make a life-defining decision as Section 20 races to prevent the attack.
Strike Back is based on the eponymous novel written by ex-British Special Forces soldier Chris Ryan.
Strike Back is a compelling story of betrayal, glory, redemption and revenge played out through the interlinking lives of two former soldiers: military hero Hugh Collinson and discharged veteran John Porter.
Strike Back - Series 6, Episode 6 Synopsis and Schedule