When Worlds Collide by elfinblue
Gen NCIS/Supernatural

https://www.fanfiction.net/s/9018850/21/When-Worlds-Collide

Good story with a humorous twist to it. This is a crossover between NCIS and Supernatural. There are no real pairings just hints. This story is about Crowley's brilliant plan to get rid of the brothers by targeting Gibbs team and making the brothers look guilty. It doesn't work and you are dragged along for a wild ride as the crack team decides to show the Fed's how it is done. DiNozzo and Dean get along like two peas in a pod. The NCIS team come up with the idea that Dean and Sam are really chasing terrorists that they call monsters when they are actually monsters acting as terrorists. Abby is wonderful and really gets into the whole sigils and accidentally bans Castiel almost killing Dean. It's a good story, the brothers get to clear their name, the government learns what is out there and the team is tighter than ever.