"Need to Know" wasn't as great as some made it out be. There were some great moments, yes. But once again, the plot fell victim to poor writing.
The strong start to the season continues with the exciting conclusion to "Valkyrie." The episode picks up immediately with Beckett telling Castle the bad news about being infected with the deadly toxin.
Castle returns with a change of city and jobs for Kate Beckett. After saying "yes," Beckett moved to D.C. where her job with the AG's office isn't going as well as she hoped.