2x09 Three Ghosts
First Aired: Dec. 11, 2013 on The CW
Summary: While recovering from a near-fatal drug overdose, Oliver begins hallucinating people from his past. Believing he's a liability, Oliver gives the information he has on Cyrus Gold to Quentin... which results in the deaths of several police officers. Meanwhile, Brother Blood captures Roy and…
Tommy Merlyn: You're not gonna die down here.
Oliver Queen: Tommy, I'm sorry. I let you die.
Tommy Merlyn: You didn't let me die, Ollie. You fought to save me, because that's what you do, what you have always done. You fight to survive. I know I called you a murderer, but you are not. You are a hero. You beat the island. You beat my father. So fight, Oliver. Get up and fight back.
Detective Lucas Hilton: Human weapons?
Quentin Lance: Look, his name is Cyrus Gold. He's the one who broke into Queen Consolidated last week. He's the one who robbed the blood bank. And he killed all those people.
Detective Lucas Hilton: Wait, hold on a second. Where are you getting all this intel? Oh, man, what's the matter with you? Talking with the vigilante's what got you demoted in the first place.
Quentin Lance: Look, we take a small squad. McCarthy and Evans from SWAT, Jones. We can bring this guy down.
Detective Lucas Hilton: I promised Jeannie I'd take her Christmas shopping.
Quentin Lance: Lucas. Please.
Detective Lucas Hilton: Fine. But you get to call Jeannie and tell her I'm not taking her shopping.
Arrow: Guess he's not as strong as you'd hoped. Where did you get the mirakuru? Who gave you the formula?
Brother Blood: It was a gift. A gift I would use to save this city from itself.
- Goof (continuity error): When Felicity goes to put the mask on Oliver, she is putting it on his bare face (there is no black makeup on his eyes). When we cut to another shot, and the camera pans around to Oliver with the mask on, he is suddenly wearing eye makeup.
- Goof (continuity error): Before the particle accelerator explodes, the power goes out in Barry's lab, and the lights from the buildings visible through the window also go out. When Barry watches the explosion, the buildings' lights are on, and go out only when the energy wave reaches them.
- Goof (factual errors): Warfarin has long been a main ingredient in rat poison, and is also used in a more pure form as a pharmaceutical for blood clots; however, it takes three to five days to take effect, and the dosage must be calculated very carefully to balance the actual thickness of how much blood versus the medicinal efficacy of the warfarin ingested. In addition, it has side effects, but hallucinations and excessive sweating are not among them.
- SPOILER: When Oliver and Felicity argue about her revealing his secret identity to Barry Allen, Felicity asks if he is going to put an arrow in Barry, to which Oliver responds that he is "considering it." In the later The Flash episode "Flash vs. Arrow" (2014), Oliver does in fact put an arrow in Barry during training. This later becomes an on-going joke between the two, being referenced frequently.
- This is the episode where Oliver receives his compressible micro fabric mask, custom made by Barry Allen, after Barry points out that grease paint is a poor identity concealer. Oliver's criteria for a mask was one that conforms perfectly to his face and doesn't affect his ability to aim while on the run.
- During the news broadcast that Barry Allen watches, the reporter notes that her name is Linda Park. Linda would later be recast by Malese Jow and play a love interest for Barry in Season 1 of The Flash (2014).
- Cyrus Gold is the civilian name of a popular DC villain, Solomon Grundy.
- SPOILER: At the end, Barry Allen receives his powers, turning him into The Flash.