A look back at the comic book references from last night's show.

Welcome back to Arrow Annotations, the Internet's number one Arrow easter egg column. If you want to know more about the comics that inspired the TV show and random factoids about the latest episode of Arrow, you've come to the right place. Past articles can be found here.

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Here's the column for the first part of the crossover.

The Brave and the Bold - This week's episode title is a reference to DC's longrunning Brave and the Bold series. Brave and the Bold started as an anthology series featuring characters from historical settings, such as Robin Hood or the Silent Gladiator. The comic was eventually brought into DC's superhero line as a way for the company to try out new characters and concepts. The first new characters to get a "try out" in Brave and the Bold was the Suicide Squad (then a World War II era team of soldiers) in 1959. The Silver Age Hawkman and the Teen Titans also first appeared in the series. DC eventually turned the series into a Batman team-up book before replacing it with Batman and the Outsiders.

The series was briefly revived twice in recent times, first as a Flash/Green Lantern team-up miniseries, and the second as a general team-up book.

Gerry - Felicity's assistant gets a brief mention at the beginning of the episode. Gerry was named after prolific DC creator Gerry Conway.

Katsu Cheng - Katsu Cheng, the Hong Kong bomber Ollie is ordered to torture, is played by Vincent Tong. Tong's voice acting credits include playing the Mandarin in Iron Man: Armored Adventures.

Arrowmobile & Arrow Cave - Cisco asks about the existence of both the Arrowmobile and Arrow Cave. Both existed in the comics, and were originally knock-offs of Batman's Batcave and Batmobile.

Digger Harkness - This week's villain is Captain Boomerang, a Silver Age Flash villain and recurring member of the Suicide Squad. Digger Harkness was an Australian performer who specialized in throwing boomerangs. He was hired by an American toy company to promote toy boomerangs, but American audiences ridiculed him and he quickly turned to crime for revenge. Taking the name Captain Boomerang, he clashed with the Flash several times and became a member of the Flash's Rogues.

Captain Boomerang also became a staple member of Amanda Waller's Suicide Squad. Harkness was one of the team's slimier members and his actions led to the deaths of several of his teammates, including Slipknot and Mindboggler.

After rejoining the Rogues and briefly losing his hands and his souls, Harkness was killed in a confrontation with Jack Drake, father of the third Robin Tim Drake, during the miniseries Identity Crisis. Drake was also killed in the fight. After Harkness's death, Owen Mercer, Harkness's illegitimate son, took up the Captain Boomerang name and his place on the Rogues.

Boomerang has made several appearances in other DC adaptations, most notably the Justice League Unlimited and Brave and the Bold cartoon shows. He also appeared as a member of the Suicide Squad in Batman: Assault on Arkham and will appear in the upcoming Suicide Squad movie, played by Jai Courtney.

Harkness was played by Nick Tarabay. Tarabay previously starred in Starz's various Spartacus series alongside Manu Bennett and Cynthia Addai-Robinson.

Dan Rizzuto - The ARGUS guard who stops Harkness when he enters ARGUS's headquarters was played by Dan Rizzuto, a stunt actor who has appeared on multiple episodes of Arrow as well as Watchmen, Man of Steel and Smallville.

Salmon Ladder - Felicity mentions that Oliver does the salmon ladder every Wednesday, which is a nice little wink to Arrow's Wednesday timeslot.

Harkness went rogue - Lyla mentions that Harkness was a Suicide Squad member gone rogue, which is funny because in the comics Captain Boomerang was a member of the Flash's Rogues.

League of their Own - Cisco mentions that Ollie and Barry are in a league of their own. That's clearly a reference to the 1992 movie A League of Their Own, which is about female baseball players during World War II.

Just kidding, that's a Justice League reference.

Bart Allen - Captain Lance misremembers Barry's name as "Bart Allen". Bart Allen was Barry's grandson in the comics, with several different code names including Impulse, Kid Flash, and the Flash. Bart and Barry share the first name Bartholomew.

Infantino and Adams - Barry and Ollie raid one of Harkness's supposed bases located at the corner of Infantino and Adams. Carmine Infantino was one of the co-creators of Barry Allen and helped launch DC's Silver Age of superheroes. Neil Adams was the artist responsible for redesigning Green Arrow's look and was the artist during a pivotal Green Lantern/Green Arrow series that ushered in a new era for the Emerald Archer.

Multiplex - Barry mentions that he's not Multiplex and can't be in five places at once. Multiplex was first introduced in the Flash episode "The Fastest Man Alive".

Supermax - Oliver mentions that Harkness has been imprisoned alongside Slade Wilson on ARGUS's supermax prison in Lian Yu. Slade's actor, Manu Bennett, and Nick Tarabay previously starred together in Spartacus as fellow slaves and prisoners.

Also, Felicity makes an offhand mention to the landmines hidden throughout Lian Yu. You'll recall that Felicity previously stepped on one of those landmines in the season 2 premiere.

Rocky III - The ending of the episode is a clear homage to the fight between Rocky and Apollo Creed at the end of Rocky III. Several lines of dialogue was lifted nearly word for word from that movie.

And that's it for this week. Thanks for reading and we'll see you all next week!