Tonight's episode of Arrow took Green Arrow and Felicty to Hub City while setting up the means by which Oliver can beat Damien Darhk.
All the while, both Thea and Diggle found themselves in grave danger as their subplots boiled over.
So...what might you have missed while watching all that unfold? A fair bit.
So...what did we see? What did we miss?
Read on, and comment below.
Armitage, a H.I.V.E. operative who's been around (intermittently) since Season Two, has a long history with Team Arrow.
He tried to steal the Markov device from Malcolm Merlyn (along with Bronze Tiger), tried to buy classified data from A.R.G.U.S. Agent Mark Shaw (Manhunter in the comics), and has been around in some of the H.I.V.E.-centric episodes this season, too.
In the comics, Milo Armitage is the former stepfather of Connor Hawke, Oliver's illegitimate son.
John Constantine came when Oliver called earlier this season, but (much to fans' chagrin) hasn't made a return trip to Star City since.
He does get a name-drop this week, though, and was key to sending Oliver to Hub City for his crash-course in defense against the dark arts.
Besides starring in his own short-lived but fan-favorite TV series on NBC, John Constantine is a mystic who has one of the longest-running series in DC/Vertigo's history, and remains the only former Vertigo character who has consistently had a title at DC Comics since the launch of the New 52.
Hub City, a fictional city in the DC Universe, is best known as the home to The Question, a self-taught urban shaman.
While The Question didn't appear in this episode, Esrin Fortuna seemed like she had a similar role (and since there was a female Question for a while, some fans on Twitter briefly wondered whether that could be what we were seeing unfold).
BIG BELLY BURGER
Big Belly Burger, a fictional fast-food restaurant in the DC Universe, is the fast food of choice for people who are in hiding, in jail, or otherwise cut off from the world on The Flash.
Here, they put it to similar use in Lyla's cell.
Felicity's reference to Oliver putting a fern in his living area is a nod to the "love fern" that appeared periodically throughout the series. The fern gained an online fan following, particularly within the #Olicity hashtag.
Besides the connection to The Question (such as it is), it's worth noting that Fortuna is one of the names used by the Three Witches, per the DC Wiki.
This almost feels like they wanted to use someonel like Enchantress and then decided not to for some reason and opted instead to create an original character.
UNDER THE DOME
Okay, we're not really making a reference to Stephen King's Under the Dome, although over on our DC on ComicBook.com Facebook page, a handful of people have already done it.
No, here, we wanted to point out that between the domed city (especially one representing an "ark" from a doomed world) and the hexagonal pattern on the field that is holding the inhabitants in, this sequence in the final moments of tonight's episode really reminds me of Convergence.
The 2015 crossover event that brought together various incarnations of DC superheroes from throughout the multiverse and comics history did so by revealing that in the last instants of time before dying realities were swept away into antimatter or whatever, Brainiac would "rescue" a city and place it on an alien world called Telos. Eventually, with Brainiac defeated by Superman and the world becoming too crowded, a being who had been left in charge of the world (also named Telos, since he was ostensibly constructed from the world itself) elected to drop the domes and force the various timelines to battle to see which of them would survive and get to "keep" the planet.