Ghost

The show's finale was originally scheduled for August 2, 2012, but was postponed by one week to August 9 due to broadcast coverage of the 2012 Summer Olympics.

Actor So Ji-sub was provided a SsangYong Rexton W, Kwak Do-won a Korando Sports, and Lee Yeon-hee a Korando C as vehicle sponsorships from SsangYong Motor for use in the drama.

So Ji-sub won the 10 Star Award and the Drama Special Excellence Acting Award at the 2012 SBS Drama Awards, while Kwak Do-won received the Drama Special Special Acting Award.

So Ji-sub played a dual role, portraying both detective Kim Woo-hyun and his police academy roommate-turned-hacker Park Ki-young after a mistaken-identity twist in the story.

Choi Daniel appeared as a special guest star playing Park Gi-young, also known as the hacker Hades, Kim Woo-hyun's police academy classmate.

The Korean Wikipedia article lists related topics alongside the drama, including The Phantom of the Opera, cyberwarfare, the 'firesale attack' concept popularized by the film Live Free or Die Hard, Stuxnet, and Enemy of the State, suggesting thematic inspirations for the cyber-crime storyline.