How about I add to that. Jake intervenes to stop Rose from being killed with the rest of the Huntsclan, but they all vanish just the same, so it's impossible to tell if he was successful.
Jake wishing that Rose was never taken by the Huntsclan, and could just have a normal life. He then destroys the Crystal Skulls before leaving. The tone in how he said to consider the skulls destroyed was one of anger, anguish, and heartbreak.
A subtle one, but also seeing Fu Dog and Grandfather Long look down because they couldn't do anything to help.
And later in the episode, where he finds that this is the case. She doesn't remember who he is, but he asks if they could meet again. She says they can't, because she's moving to Hong Kong. Rather bittersweet, really.