Arielle Vandenberg

When Ted takes a page from Barney's book and lives like there's no tomorrow, he gets a post St. Patty's Day reality check from Marshall.

Booth and Brennan are on the case when shattered, pulverized human remains are found in a garbage bag at a photo shoot. When the team discovers a meteorite shard lodged in the victim’s ear, they are led to the Collar Institute of Science, a famous center for physics research in D.C. After questioning scientists at the institute, they discover the remains are those of Dr. Diane Sidman, a leading scientist and editor-in-chief of the Journal of the Collar Institute, who was also engaged to the Collar’s founder. When they discover Dr. Sidman had been working on an extremely controversial project, Brennan and Booth investigate a multitude of death threats directed at her. As the team tries to decipher the cause of her death, Booth and Brennan are on the search for the killer, but their scientific method leads them into a dangerous situation. Meanwhile, Angela’s father (guest star Gibbons) comes to town to seek revenge on Hodgins, and Sweets attempts to mediate the situation.

While investigating the mysterious death of a college student in a car fire, Delko suspects that his late partner and friend Tim Speedle may still be alive. Rory Cochrane Returns as CSI Tim Speedle.

The CSIs investigate first-hand the behind-the-scenes action of Cirque du Soleil in order to determine what may have contributed to a young dancer's untimely death. Later, after visiting a nightclub, Catherine finds herself in jeopardy and must act as her own CSI. Also, Grissom is perplexed by an uncanny miniature replica of the crime scene he is investigating. (TV-PG)

Rusty is nervous about the upcoming fraternity 'date night' due to his inexperience with women, which Cappie attempts to help him overcome much to Casey's dismay.