I've been catching up on Castle, and the song he is humming on in this scene at the end of the episode "Home Is Where the Heart Stops" (S01E07) is stuck in my head. He is trying to stay in the car, he really is, but he is forced into action and an instrumental version plays as he grapples with the bad guy.
I know I have heard this song in later action sequences in the series as well, but the closest I can make from the YouTube comments is that it may be an instrumental version of a Robert Duncan song. I am not sure who that is, but if anyone can give me the title of the song or perhaps a link to the original if it was not created for the show that would be great.
Penenene nenenene penenene ne ne!