This week's program goes to the 'tip of the spear' with elite commandos trapped in a lethal and protracted gun battle in Afghanistan.
"It's not like TV, it's not a movie, this is for real" says army chaplain Padre John Sanderson.
Earlier this year Corporal Cameron Baird was awarded a posthumous Victoria Cross for his raw courage in the heat of combat.
In this concluding episode, his commando colleagues provide a rare, poignant and riveting account of those fatal hours...
