Ep 11. Death in Heaven

When a seemingly-invincible army of Cybermen threatens to invade Earth, the Doctor and Clara are thrust into yet another adventure that will test their wits and strength. But this time, the stakes are higher than ever before as the mysterious Missy finally reveals her true identity and shocking plan for the universe. As the Doctor races against time to prevent the Cybermen from gaining control, he is forced to confront his own demons and make difficult choices that could change everything he knows about himself and his mission. Meanwhile, Clara must grapple with the aftermath of her own choices and face an unexpected loss that will forever change her relationship with the Doctor. In the explosive finale of Season 8, old enemies and new threats collide as the fate of humanity hangs in the balance.