Arrow Season 5 episode 8, the 100th episode, was full of easter eggs and throwbacks to the first season. We can hardly get to all of them. Between Deathstroke, Oliver’s old maid Raisa and hearing some of the same dialogue from the series’ best episodes, Arrow's 100th was one huge nod to the show and the character's rich history in the comics. Here are some of the most memorable references.

Black Canary Logo

We got to hear Oliver call Laurel “Dinah,” for maybe the first time in series history. Laurel is also wearing a necklace she says Oliver gave her. It has a canary on it, which is the Black Canary logo in the comics. The subtle reference pays tribute to Black Canary’s legacy both in the show and in the comics as a longtime Justice League and Birds of Prey member.

The Hozen

“Thea, it’s a rock,” Oliver says when she gifts it to him, the same gift Oliver gave to Thea in the pilot episode of the series. The Hozen is an arrowhead-shaped stone Ollie got off a dead Japanese soldier on Lian Yu. Thea told Oliver the hozen is a symbol for reconnecting in Buddhism, which is the same thing Oliver told Thea back in the day. She wasn't too impressed at first either.

Walter Steele

When Robert Queen insists Oliver take his job as CEO, Oliver suggests Walter Steele instead. Ironic, considering after Robert’s death Mori married Walter, who became the CEO of Queen Consolidated. After Malcolm and Moira kidnapped Walter, he left the business, but Oliver later approached him to help save the company from going bankrupt.

Oliver Running

Right off the bat, we get a running sequence. This was a throwback to the start of nearly every season premiere of Arrow, and a handful of other episodes.

Palmer Tech

Palmer Tech bought Queen Consolidated in Season 3 of the show, but in this alternate reality, Ray was pondering a deal as soon as he heard Robert Queen wanted to step down and Oliver wasn’t interested in taking on CEO. The interesting thing is Ray is married to Felicity in this fake reality, but there's already a Smoak Technologies building. When the Legends travled to 2046 last season, Smoak Technologies was what became of Palmer Tech after Ray's assumed death.

Cisco Vibes Ollies Bow

This isn’t exactly an easter egg or throwback, but seeing Cisco have access to all Oliver’s past and future memories was sentimental to say the least. There’s so much history in that bow.

The Hood Sketch

In this alternate reality, John Diggle is acting as the Green Arrow. However, it doesn’t seem he’s officially taken the name yet. The police still call him ‘The Hood’ and we see the old police sketches of the vigilante, just as we did with Oliver in Season 1.

Smoak Technologies

In the same future timeline where we met Connor Hawke’s Green Arrow, Smoak Technologies existed because Ray was presumed dead and Felicity renamed it from Palmer Technologies. In the Invasion! crossover, Smoak Technologies is where Oliver, Ray, Thea, Sara, and Dig go to escape The Dominators alternate reality.

Dig As Green Arrow

The Legends crossover last year revealed that in the year 2046 John Diggle Jr. goes by Connor Hawke and operates as the Green Arrow. This was a nod to what could be. In the comics, Connor was the second Green Arrow and son of Oliver.

Chicago Med

When I saw the second Green Arrow, I was really hoping for Tommy behind that mask instead of Diggle. But it all made sense in the conversation between Thea and Malcolm Merlyn.

“Too bad Tommy couldn't make it,” says Thea. “well They've got him working triple shifts at the hospital these days. Besides, Chicago isn’t exactly next door,” Merlyn responds. “I can't believe he’s a doctor now,” says Thea.

The dialogue suggests Colin Donnell couldn’t return because of a contract with NBC for Chicago Med , where he plays a Dr. Connor Rhodes. The fact Donnell couldn't make it back for the 100th episode also means he’s probably not Prometheus either.

Gunfire

The tech Team Arrow, The Flash and Legends need to stop The Dominators was from Van Horn Industries. In the comics, it’s owned by the family of a superhero named Gunfire. He can manipulate particles to explode or fire energy blasts.

Falcon Rescue

The scene looked a lot like when Han Solo came through with the Millennium Falcon at the end of Star Wars . The Waverider is flying sideways into the shot while a cluster of smaller spaceships attack. Pretty epic for network television. This wasn’t the first Star Wars reference in the series; Mr. Terrific also named a piece of alien tech after C-3P0.