Noah Kuttler

An unnamed man, nicknamed "The Calculator", is the ex-husband of Donna Smoak, and the father of Felicity Smoak. It was implied Felicity's father was an intellectual of some kind having conversations that even his wife did not understand.

Biography
When his daughter Felicity was young, he abandoned her and his wife, Donna.

Coercing Roy Harper
While Roy was living under a new identity, the man discovered Roy's secret. He then blackmailed Roy into helping him, telling him he would reveal his identity. To watch Roy's every move, the man had Roy put on a lens in his right eye.

Once Felicity broke through his encryption code, he contacted Felicity, disguising his voice. The man told Felicity his intention wasn't to take down the internet but a city.

Once a few mercenaries placed the device on site, the man was contacted by Felicity. The man teased her on what he could do to the people on a subway and the only way he could be stopped is if she removed the device. He was then told she had friends but he told her he has his own. Once Felicity installed a firewall, he told her it didn't matter because he could decode the firewall with ease. Once the man decoded the firewall, Roy destroyed the device before he could execute the web nuke. A virus was then installed on his computer to remove everything he had on Roy.

Reuniting with Felicity
While Felicity made her presentation at Palmer Technologies, the man watched. The man applauded her presentation and made compliments toward Oliver Queen. The man then greeted his daughter shortly after.

Abilities

 * Genius-level intellect: According to Donna, Felicity's intellect was inherited from her father.