Outer Darkness [Dramatized Adaptation]
Outlanders 10

His new world born out of the fire and ashes of a nuclear exchange, a rogue warrior searches for ways to undo the past. With brother-in-arms Grant and the archivist Brigid Baptist, he dares to seek out the secrets of time...

Kane and his fellow exiles are thrown into a reality where the nukecaust didn't happen—instead, the inhabitants had driven the enemy from the planet. But now the dark forces are back for a final confrontation in a war that may bring the ultimate freedom or final destruction. (The Lost Earth Saga - Book #3 of 3)