Lyla Michaels, who is Diggle's ex-wife, gets captured in a Russian prison while she is there to looking for leads on Deadshot. John finds this out from Waller and he, Oliver and Felicity go to Russia to break her out. When they get there, they meet up with Anatoly who gives them a way in. Diggle acts like he is selling drugs and gets arrested and goes to the prison. While inside he finds out that Deadshot is there. He and Deadshot get Lyla out with the help of Oliver. Once they are safe, Diggle gets Deadshot out of the vehicle and they have a conversation about who hired him to kill Andy Diggle. Diggle finds out that it is a organization called HIVE. Diggle then leaves Deadshot there and the team heads back to America.

"I am glad that you have some answers now Diggle." Quentin said.

"Yeah, me too. I will have to look into this group." Diggle said.

A week later it was time for Moira's trial. Oliver and Thea arrive at court and see their mother lead in. Oliver tells Diggle to take the day off because he doesn't look good. Diggle goes to the lair and passes out. Felicity does a blood test on Diggle and finds out that he has Vertigo in his system, and they can't figure out how it got there.

Back in Court, things look like they might be going good until Thea gets on the stand and the DA gets her to admit that she didn't visit her mother for months because she was mad at what Moira had done. While questioning Thea, the DA passes out because of being exposed to Vertigo.

Oliver leaves during one of the breaks in Court and goes to see what the team has figured out. Diggle still looks like he is in bad shape and they find out that the cure didn't work on him.

The Count sends out a video with the DA and tells everyone that the only way to feel better is to take Vertigo and then he doses the DA with it. Oliver goes to the place to save the DA. He was not able to catch the Count though.

Oliver goes back to Court and is there until the jury leaves to discuss the verdict. While Oliver is at Court Felicity and Diggle find out that people are dosed when they take the Flu shot. Felicity goes to check out the van that Diggle went to go

get his shot. She is captured by the Count. While Oliver is waiting for the verdict to come in, he gets a call from the Count saying that he has Felicity, so Oliver left to go and save her. Oliver ended up killing the count in order to save Felicity. Oliver went back to court to find out that the verdict was ready. They went back in the courtroom and Moira was found not guilty. It is later found out that Malcolm is still alive and that he is the reason that Moira was found not guilty. Malcolm then announces something that Moira hoped that he never found out. He was Thea's father.

"Are you shitting me. I am the daughter of the psycho?" Thea asked.

"Unfortunately, it is true, but Robert will always be your father because he raised you." Moira said.

"I don't know how I feel about this. I guess it is good that this is out in the open. If I was to get mad at you later, I might would do something stupid." Thea said.

"I know. I am sorry I didn't tell you sooner." Moira said.

There is a break-in at the Applied Sciences building which bring Oliver, Felicity, and Diggle there, with Quentin and some other police to investigate. A new person shows up who no one knows. His name is Barry Allen and he said he was investigating a similar case in Central City. Barry said that this crime was committed by one man. Oliver was hoping that this was not true because he had seen things like this while he was away with the Mirakuru.

Later Roy and Sin were looking for one of Sin's friends who had been missing. They found him and he had bled out of his eyes and was dead.

Oliver and the team were back in his office when Barry came to set up some of his equipment. Oliver ended up finding out that Barry wasn't on a case and he confronted him, finding out that Barry's mother was killed by a man in a yellow suit who could run really fast. Barry then decides to leave because he has been found out. Oliver then finds that the thief is now robbing a blood bank, so he goes to stop the man and has a hard time dealing with the man's strength. He tries to stab him with an arrow but the arrow bends, but it does have some blood on it.

He gets Felicity to test the blood and his worst fears are realized. The Mirakuru is in Star City somehow. They find out what kind of sedative is being used and where to find it. The team finds out that the thief will go and get the sedative and so Oliver goes there to stop him and, in the fight, Oliver gets injected with some kind of serum that will kill him if he is not cured. Felicity and Diggle went to find Barry and hit him with a Tranquilizer Dart. When he woke up, he was staring at the Arrow who happened to be Oliver Queen.

Malcolm had approach Moira earlier in the day about telling Thea that she was his child and Moira said no, but Malcolm gave her some information that would help her to stop him. When Malcolm returned later to find out if Moira was going to tell Thea, he found out that Moira had contacted the League of Assassins to let them know that he was still alive, and they were going to be after him which made Malcolm leave because he needed to hide.

Barry was able to save Oliver by giving him rat poison which can also be used to thin blood. When Oliver woke up, he got Barry in a choke hold and was mad that Felicity had let someone in on his secret.

Roy who is still recovering from being shot in the leg by Oliver who was trying to dig into the Mirakuru case. Roy and Sin continue to look into her friend's death. Roy ends up being captured.

Later while Oliver is at the mansion, he starts to have hallucinations and he see Shadow who tells him that he needs to stop his mission if he wants to live. He is then in the lair when he sees Slade and he tells Oliver that he is responsible for every bad thing that is going on around him. Oliver has Barry run a blood test on him so that he can see why he is seeing things. The blood test comes back clear. Oliver has to figure out why he is having the hallucinations. He finds where the centrifuge and Cyrus Gold are hiding, and he goes after them. Cyrus beats him pretty good and while he is down, he sees Roy get injected with the Mirakuru. The man in the skull mask says that the serum didn't work, and Roy was dead.

While Oliver was down, he has one more hallucination. He sees Tommy this time who tells him that he is not a murderer but a hero and that he needs to get up. Oliver fights back and kills Gold when he destroys the centrifuge along with the mirakuru.

Oliver revives Roy and makes sure to keep an eye on him because he knows what the mirakuru can do. Later Oliver went back to the lair and saw that Barry had left him something. He opened the box and found the new mask to use when he went out as the Arrow.

Barry went back to Central City to watch the particle accelerator start and was later in his office when the accelerator blew up and combined with a storm which then sent lightening through him which left him in a coma.

"That poor kid seems to have no luck." Tommy said.

"What is the importance of Barry anyways?" Sara asked.

"You will see soon enough. He ends up being a very good friend." Mia said.

Oliver is out in the field going after every informant that he knows so that he can find the man in the skull mask. He is not having any luck though. While he is out one night there was an explosion. He goes to see what is going on, but he isn't able to find much. He later gets in touch with Quentin so that he can get some of the evidence that the police have. Quentin asks the Arrow if he can look into people being dirty in his unit. While they are talking another bomb goes off.

Later in the lair, after Felicity gets back from visiting Barry, she is looking at the evidence and she is able to find a signature with the way the bomb is made. It leads back to Mark Scheffer.

Blood is going to hold a rally in order to get support and Oliver tries to talk him out of this as the Arrow. He refuses because he doesn't want to give in to the terrorist.

Laurel seems to think that something is off about Blood and while she is visiting him in his office, he notices a bill to a psychiatric facility. She goes to investigate, and she finds out that woman there is Blood's mother and that she was placed there to hide that Blood killed his own father.

Later Oliver goes to Scheffer's business and finds that it is rigged with bombs. Felicity helps him out and finds him a fuse box which Oliver shoots with an arrow shutting down the power along with the bombs. Oliver then gets to the rally and helps take down Scheffer. While at the rally a metal structure falls, and it lands on Roy's back as he protects Moira. This is weird for Roy because he still doesn't know what is going on with him. He knows that he has strength, and he is able to heal fast being that the arrow wound is gone now.

"Felicity seems to be very useful. Why is it that you want me with your dad and not her again?" Laurel asked.

"Mom reacts to much on her emotions. She does what she thinks is right and it ends up not working out the way she wants it to. You will see later on what I am talking about. The thing that got me the most was that she made me think that vigilantes were all bad and that means that I thought that dad was a bad person for most of my life until I finally found out the truth." Mia said.

"I guess I can see your point. We will just have to see what happens later. I will tell you now though, you don't have to worry about your mom getting with your dad because I am not going to let him go this time. By the way, what happens to you if we change things like that?" Laurel asked.

"I will become someone else. I will become your child." Mia said.

"I think I can live with that." Laurel said and then they got back to watching the video.