TV Guide; May 2007
Earlier in the season, in the episode 'Burned'- in which a husband and wife kept doing more and more terrible things to each other- Elliot thought about going back to Kathy. He didn't want to be that kind of person- he wanted the safety and comfort of home. But he just wasn't able to take the final step because he's so tortured by the work he does. It took a cataclysmic case where a family was destroyed for him to decide to make the move back. When Dylan Walsh's character murdered his wife and children in 'Annihilated', it brought home to Elliot how things can change in an instant and made him realize how much he loved his wife and family. In the finale, he found out that Kathy's pregnant. His kids range from 15 to 22, so next season he's going to have to learn how to be a father to a child again, as well as a husband.