Before the Flood (2) (S09E04)

A ruthless alien commander devises a sinister scheme to secure his own existence at a secluded military base. As events unfold, the Doctor finds himself faced with an unimaginable choice, one that could alter the course of their mission and the fate of those involved. With time running out, tensions rise as the Doctor grapples with the moral implications of his actions while racing against the clock to thwart the warlord's dangerous agenda.