Luther is sent to the Moon by his father and is told it's very important. Originally you think he just did it to get rid of him, especially as he does nothing with the Rock samples. Later you understand that Hargreeves knew the Moon was the threat of the end of the planet, so he literally wanted Luther to be a sentry there. He knew the Moon was involved in the end of the world, he just didn't know how.
But now they have his frozen wife there and Luther was there to guard her unknowingly, I guess? Seems a little confuddled, but I liked either way have Luther have a purpose on there, not just a very expensive "fuck off" from Daddy.
Viktor/Vanya stuff was handled better than it could have been, wasn't too irritating. Besides some of the best man stuff it wasn't all that cringeworthy. Think Page's acting was miles better this season than it was last season too. Not sure if they just didn't feel comfortable and it was spilling out into their acting, or what. Anyways Viktor seemed way more tolerable than Vanya who fucking suuuuuuuucked. Viktor still dances like a 14 year old girl though.