Air date: 4/15/10

An investigation leads Brennan back to her old high school, where a classmate of Brennan's is found murdered, similar to another girl in her class 15 years prior. Booth and Brennan go undercover as a married couple during the high school reunion to try and discover the killer, which includes several of her previous classmates. Brennan is helped by her only friend from high school, the janitor, Ray Buxley, to help find the killer. Back at the lab, Wendell accidentally finds out from Hodgins that Angela believed she was pregnant and did not tell him. Wendell then tells her would have taken his share of the responsibility and consequences. Later, Angela ends their relationship as she felt his answer to the pregnancy was that it was his obligation. After the case, the team get together at the bar sharing their high school experience. Brennan expresses she was glad she attended the reunion and that she realizes how lucky she is to have the friendship she has today.

The Predator in the Pool

Air date: 4/22/10

A case leads Booth and Brennan to an aquarium where the remains were found inside a shark. The case is brought to them by Dr. Catherine Bryar of the National Oceanic and Atmospheric Administration, who seems to show an interest in Booth. Both Booth and Brennan try to move on into romantic relationships as Brennan goes on another date with Andrew Hacker, and Booth asks out Catherine after the case is solved.

The Rocker in the Rinse Cycle

Air date: 4/29/10

When the body of thrill-seeker is found in a hotel laundry machine, Booth and Brennan investigate the place he was last seen–a rock and roll fantasy camp. Cam looks for a gynecologist for her stepdaughter Michelle. Cam later goes out on a date with Dr. Lidner after he asks her out.

The Witch in the Wardrobe

Air date: 5/6/10

The remains of two Wiccans, one of which is from the Salem witch trials from the 1600s and the other a modern day Wiccan, are discovered in woods of a burned down cabin. Booth and Brennan investigate the world of Wicca, including discovering the group of Wiccans the victim was a part of. Hodgins and Angela wind up in jail after some reckless driving, having to work the case from the jail cell. After spending quality time together, they realize they are still in love where Hodgins proposes to her and then they get married by the judge.