I can't see anyone else besides drop-dead gorgeous, tough, elegant and ruthless (and occasionally goofy) Kim Nam-Gil as the lead. And Lee Hanee as Prosecutor Park is every bit his match for wit, tenacity and fiery temperament. She's a comedic genius who can also act seriously. Their chemistry was EPIC. Unlike an American show, the writer made sure that their propriety (and his sacred vows) was maintained. The supporting cast was great too. Jeon Sung Woo as Father Han and Baek Ji-Won as Sister Kim particularly stood out for me. Jung Dong Hwan as Monsignor Lee, Fr. Kim's savior and mentor was fantastic and felt genuine. Loved the up-and-down, warm father-son relationship they had, their arguments and Lee's touching kindnesses to Michael that thawed his frozen, wounded heart. I cried pretty hard when he got murdered early on. His tragic arc gave the show the DRAMATIC dark heft the story needed. And I liked how Kim Sung Kyun's Detective Koo went from being the idiot butt of his squad's jokes to being an effective, empathetic and moral officer who got his respect and mojo back. The OST is classic, catchy and effective with so many different moods and flavors. As a lapsed Catholic, watching the show made me miss attending church and gave me the impetus to return! But I must admit that I wish someone looking just like The-hand-of-divine-justice, HOT Father Michael Kim would visit my parish!!! I can't wait for Fiery Priest II to become reality and I hope that most of the cast, especially Lee Hanee, will be able to reprise their roles. 10+++