astle is a very good American comedy-drama television series, broadcast on ABC and produced by ABC Studios. Castle premiered in 2009 and is currently in its second season. Castle Season 2 Episode 17 (Castle s02e17) with title “Tick, Tick, Tick…” airs on Monday, March 22nd 2010 at 10:00 pm via the ABC Network. “Castle” follows Nathan Fillion as Richard Castle, a famous mystery novelist who is called in to help the NYPD solve a copy-cat murder based on his novels. Stana Katic stars opposite as the young detective Kate Beckett. Following his encounter with Beckett, Castle decides to use her as the model for the main character of his next book series. He uses his contacts and receives permission to accompany Beckett while investigating cases.