A look at the Easter eggs and comic book references from last night's episode.

Did you watch last night's episode of Arrow? Are you wondering what connections the episode has with the comics? Do you like Easter eggs (and not just the brightly colored kind?) Arrow Annotations is here to help, providing some additional notes and background info from last night’s episode. Arrow spoilers follow!

Count Vertigo - This is the Count's first appearance this season, and the first time he refers to himself as Count Vertigo on the show. You can find our notes about the Count in the Arrow Annotations for "Vertigo".

The Dollmaker - The prisoner the Count frees at the beginning of the episode was Michael Eklund's Dollmaker, whom Black Canary killed in "Broken Dolls". I thought that was a nice little cameo that explained how the Dollmaker escaped prison in the first place.

Star Lab Particle Accelerator - Seven episodes, seven mentions of the STAR Lab particle accelerator in Central City.

Markovia - When trying to track the source of Count Vertigo's broadcast, Felicity mentions that the signal was bounced off a STAR Labs satellite, and could have been originated from anywhere between Starling City and Markovia. Markovia is a fictional country in Europe, ruled by the Markov royal family, and is located between France, Belgium and Luxembourg. The country was briefly a satellite state of the Soviet Union in the 1980s.

DC heroes Geo-Force and Terra are both from Markovia, the former of whom made a brief appearance in "Darkness at the Edge of Town" as the creator of the earthquake device used to destroy the Glades.

Kate Spencer - District attorney Kate Spencer makes another appearance on Arrow, her first this season. We previously covered Kate in the Arrow Annotations for "Damaged". Once again, she's played by Chelah Horsdal.

Shado's hood - We get to see Shado and Sarah's first meeting, which Sarah referenced in "Crucible" when she mentioned that Shado had worn the green hood before Ollie did.

Brother Cyrus - The criminal/cultist that was successfully injected with Brother Blood's mystery serum is named Cyrus. Most likely, this is a reference to Cyrus Gold, whose body was reincarnated as the monstrous Solomon Grundy after he was killed and dumped in a swamp. While usually associated with Green Lantern or Batman, Grundy was also a foe of Green Arrow during Brad Meltzer's run, and trashed the Arrow Cave while fighting Roy and Ollie.

We'll cover Grundy more in detail in a later installment, once we get confirmation that Brother Cyrus is in fact Solomon Grundy.

The actor who played Cyrus, Graham Shiels, also had an uncredited appearance in Thor: The Dark World.

"Death is just an illusion" - So how exactly did Malcolm Merlyn come back from the dead? The obvious answer is a Lazarus Pit, one of Ra's al Ghul's rejuvenating underground pits filled with primordial chemicals. It's also possible that Merlyn just has really good muscle control. Looks like we'll find out in an upcoming episode.

And here's two I missed last week:

Mockingbird - Amanda Waller was referred to as Mockingbird when her strike team captured Diggle at the beginning of the episode. Mockingbird is the call sign of the mysterious leader of the Secret Six, a team made up of random strangers working together for a mysterious goal. The Secret Six first appeared in the Silver Age as a group of spies and adventurers. In 2006, Gail Simone rebooted the concept as a group of supervillains working against the Secret Society of Supervillains. Both Waller and Lex Luthor have led the Secret Six as Mockingbird.

Blue meth - The blue meth that Diggle is "caught" with is a little wink towards Breaking Bad. The main character of the AMC show, Walter White, creates a special type of meth that has a distinctive blue color.

And that's it for this week.

Oh, and I'm happy to announce that we will be running a Flash Facts column for next year's Flash television show. So the next installment of Arrow Annotations will serve as a launch point for that column.