After months of anticipation and teaser photos, the "IRIS" spin-off drama "Athena: Goddess of War" finally aired its pilot episode on December 13th. Considering the smashing success of its predecessor, it's unsurprising that it raked in impressive viewer ratings on its debut night. According to AGB Nielsen Media Research, Athena achieved a killer 22.8% through SBS. In comparison, its competing dramas - KBS2TV's "Mary Stayed Out All Night" and MBC's "Queen of Reversals" - registered ratings of 8.4% and 14.5%, respectively. Athena's ratings are particularly impressive�since it's difficult for dramas these days to go past the 20% mark after the first episode and maintain their viewers' interest. We'll be checking back with follow-up stats for the upcoming episodes, so stay tuned! Source: Star News via Nate