There are several shows that are more adult—The Wire is probably the one I'd immediately think of—but yeah, for a "genre" show this is significantly more adult than most. BSG is another one that does pretty well handling morally grey characters and heavy themes.
Bran wasn't saving Jon; he didn't know he was there. He was just trying to kill the wildlings so they wouldn't kill them. He didn't know Jon was there until most of the wildlings were dead. By the time he was himself again, Jon had rode off.
If you look at the front angle replay (head on coming into the chicane) you can see how overly defensive of a line Kimi was taking after Perez had already committed. Very similar to the famous Prost/Senna @ Suzuka, if not nearly as important.