When they rock up at the farm, Thea says that hiding out on the farm sounds like something from a movie she saw.

That would have been awesome. Can we pinch him from GoT? I don't know how the filming schedules are.

Are we going to talk about that Age of Ultron reference?

It was pretty cool seeing Barry, Caitlin and Cisco trying to manage something without an authority/figure mentor, which is why I don't mind too much that Jay wasn't in this episode.

I don't know how legit this is, but the wiki page for the upcoming episode, 'Fear the Raven', lists Maisie Williams in its cast, returning as Ashildr. https://en.wikipedia.org/wi…

So when the Doctor talks about Clara getting a second chance at the end, was that a bit of a meta-reference to Coleman's return, or…?

There is that comic crossover with TNG cast meeting Eleven, Amy and Rory and TOS crew meeting four.

If Malcom's gone rogue or further pissed of the LoA (didn't they kick him out?) and Thea's working with him, then the LoA might send operatives after them, I guess - and Sara would have already known Thea and Starling City.

Ozzie and the Sqauddie I think. Oswald (Clara) and Squaddie (Danny), presumably a reference to Danny's military career.

YES! Especially when the Doctor is placing the chrono-things around the school.