Dad left Heaven and he hasn't been home in a few millennia. Shepherding people, blessing things, the angel mission! Castiel finds Gabriel and asks him for his help to find God to stop the Apocalypse before Dean goes to Hell. Chaos ensues. -- "You might have heard, I have been assigned the mission to lead the garrison that will rescue Dean from Hell," informed Castiel, his eyes fixed on the distance. He stood so solemn as Gabriel turned to him in surprise. "You? I didn't know!" he exclaimed in surprise. "I'm sorry Castiel." "It's an honour to have been chosen for such an important mission," Castiel said, his eyes never quitting the skyline of the city. -- There will be Destiel and Sabriel This work is also on ao3 under the same username