A/N: I do not own Castle and this is purely for fun. This just popped into my head after watching last nights episode :)
Aftermath
Kate was still looking at where Castle departed as Josh hugged her, when gunfire erupted. She pushed away from Josh. Esposito and Ryan ran out of the conference room guns drawn.
"Josh stay here!" Kate ran down the stairs with Esposito and Ryan to the precinct doors. Lying on the ground on the stairs of the station was Castle. "Oh god...Call an ambulance! Officer down!" Kate ran out the doors with Esposito and Ryan flanking her, guns still drawn in case the shooter was still there. Kate knelt down beside Castle. "Castle?"
"Kate..." Pain laced his voice as he struggled to stay conscious, he wasn't moving. His light blue shirt was now a turning dark red.
"I'm here, you stay with me. You have to stay awake for me. You hear me." Each word emphasized how much he needed to listen to her. She put her hands over the wounds to try and stop the bleeding and he groaned. "Sorry. I'm so sorry."
An officer from precinct doors shouted that an ambulance was enroute. By then the entire precinct was now outside trying to piece together what happened.
"Sis..ter..." Kate looked at him confused and Esposito knelt down beside them. Agent Fallon was now standing with them.
"McCan's Sister?" Castle nodded to Fallon. "She shot you?" Castle again gave them a faint nod. Fallon grabbed Ryan and they went off to find her.
"Okay don't worry about that now." Castle's eyes were closing and Kate panicked. "No no no Castle you stay awake!"
"Take care of A..." Castle's voice was fading, blood on his lips and tears were falling from his eyes. Kate had tears streaking her face and her voice was lost to respond to him.
"No Bro, you will take care of Alexis. You need to hang in there." Esposito had a hand on Kate s shoulder and she found her voice.
"You will not give up." Sirens could be heard in background. "Here that? They are almost here." Castle's eyes were closed and he wasn't responding. Kate leaned down her face near his. "Castle!"
His eyes opened slightly and he gave a small painful smile. "Love you Kate..." His eyes closed and his breathing stopped.