Bruno Amato

Kirsten's anxiety over Seth reaches breaking point; Summer and Marissa try to forget their ex-boyfriends; Caleb becomes increasingly paranoid about his business; the Cohen house is in a state of disarray as renovations are made.

As term time begins again, Seth and Ryan settle back into Newport life. They try to win back Summer and Marissa's affections, but it soon becomes clear that things won't return to how they once were.

Charlie offers Alan a suggestion to cure his insomnia, and Jake begs Charlie not to get involved with the mother of a girl he likes.

Barney concocts a plan when his father arrives at the hotel; Ted thinks he is being framed when a wedding-related duty gets messed up.

The team investigate a mass murder at an internet security company, while Prentiss must complete recertification training under Morgan's supervision.

An anonymous source provides advanced details on an important story; the staff cuts its anniversary party short.