They sure know how to hit you in the feels. This episode, it was mostly the stuff with Billy. Watching him get unhinged was rough. Especially when Suzuki tries to bring him to his senses. Finding the camera, all the probes, and then the letter was heartbreaking.
Speaking of getting unhinged, Kentaro really seems to be thinking that time travel might be doable and that it might be a good idea. We've seen that the rifts and Axis Mundi do play games with time, but I'm not sure what his plan is.
Isabel seems to be just another capitalist exploiter of nature. I'm sure she thinks she's doing something good, but almost nobody ever realizes that they're a villain.
Knowing the rules of the Monsterverse, Isabel and Kentaro's lack of respect for the Titans and Axis Mundi may result in their deaths. Kentaro will probably live due to plot armor. Not unscathed.
I honestly thought Cate was going to bond with the egg and make it hatch. She's definitely done some reflection and growth the past couple of episodes.
My biggest disappointment in the episode was Kong not smashing the helicopter with the speakers. I get why it didn't happen but I would have just enjoyed it. I'm sure Kong will get a chance to break stuff soon.