"I was born during a howling thunderstorm on the first of April, shortly after midnight. According to the doctor, as I took my first breath the heavens shuddered with a thunderclap unlike any he had ever heard before… or since. Needless to say, after a birth like that, people expected great things. But I wasn’t quite ready for the pressure, so I spent the next few years sucking my thumb and spitting up on people."
Now he works with Detective Kate Beckett from NYPD, who's at the same time his inspiration for his new books (Heat Wave; Naked Heat; Heat Rises). He has got one daughter, Alexis and his mother Martha, who lives at my apartment too. And he had two exwives, Meredith and Gina. Merdith is Alexis mum. He likes her, but he doesn´t love her anymore ...
In the final episode of season 3, Montgomery's funeral, when Kate was shot by a sniper, he told her: "I love you." In the first episode of season 4, she told him, she can't remember her shooting, but that was a lie... she can remember everything she told her therapist...
He and Kate made out in the finale episode of Castle season 4 "Always". After she tried to call him, he didn't reply to her calls, she went to his loft. She kissed him and told him, she wants just him. After some little problems in the beginning, they got each other naked and entered the bedroom.