Larmina telling Daniel why he belongs with the Voltron Force before holding his hand at the end of "Lion Riders Return."
Allura comforting Vince throughout "Dark Blue." Made especially effective since Allura herself had similar doubts about being a worthy member of the Force in the original series.
Lance apologizing to Daniel at the end of "Flash Forms a Go!"
Finally seeing Sven again, even if it's not under the happiest of circumstances.
Vince risking his life to save the other Voltron Force members in "Five Forged", dispite everyone telling him he wasn't ready for the test.
In "Ghost in the Lion", Lance giving up his Voltcom energy so that Daniel has a chance to survive. Especially the excuses they give for why this is or isn't a good idea.
Lance: Besides, this way you'll always remember me as cool.
Daniel: Wait, no, no, no! That's lame! Lance, I'll remember you as lame! Don't!
When Allura finds out that Keith is Arusian and tells him that Arus needs a king... Did she just propose to him?