Fallen angel brothers

Castiel meets Dean winchester

After saving Dean from the flames of hell, Castiel was on vacation, but he was not the type of getting relaxation. He got used of doing jobs and tasks. In seconds, a thought came across his mind. He decided to meet Dean winchester. He called Uriel to be with him during the mission, generally he accepted. 

Later that day,

Dean and Sam tried their best to find out who had brought dean out of hell and why, it did cause some damage to their friend who is trying to contact Castiel but he won't allow because human cannot see angels true form.

Castiel was upset, all he could ask was 'are those winchesters are really worth it? Or they are just stupid'. Uriel came by with some new assignments for Castiel and himself. "Castiel, looks like our father has a new assignment for the both of us, I would express myseld towards how fun it be for this. Apparently our father has ordered us to meet the winchesters. We have to be in a rush, due to signs of apocalypse has begun. What do you say Castiel?". Castiel didn't answer at first but he became intrested as he flew, leaving Uriel. 

Bobby told the brothers if they could try summon it, he thought it might be a powerful demon, unfortunately Sam had errands to do so he did miss the party. So only left Bobby and Dean. As they set up the signs and holy weapons just in case if it was a demon. Castiel looked at them and sighed, "This is going to take a while". As they waited, Uriel came by aand landed on the roof, "Castiel, please do remind me that I have to track you and you didn't tell me that you were already here". 

Castiel walked from the roof to the door as Bobby and dean heard footsteps from the roof as trthey reload thier weapons and watched the door. As the doors split open the light bulbs around the building started exploded. Inside jimmy novak's mind was so mind blown by what Castiel could do. "That's what I called Epic entrance'. 

Bobby tried to use his gun to hit castiel but failed as he started to fell asleep because of Castiel placed his hands on his forhead, it was a distraction for dean as he reached to the demon blade from ruby, the only blade can kill demons. Dean stabbed Castiel in the heart and Jimmy was already panicked so much but he felt calm as Castiel talked to him, "It's alright novak , i'll protect you because i promised myself to". Jimmy couldn't believe it, Castiel had just said like as if he had experienced being a family. Castiel tooh out the angel blade and pushed Dean few steps back and looked at the table when he saw a picture of Dean and Sam.

Dean:"Who are you?"

"Castiel, angel of the lord".