During a blizzard that causes a citywide blackout, the team must solve a murder case that could be connected to a possible viral outbreak; Sweets starts a touchy conversation about Brennan and Booth's relationship.

Sniper Jacob Broadsky takes out a victim who escaped from the justice system; Booth uses his military training to try to stop Broadsky before he strikes again; Angela's father visits the Jeffersonian.

When the liquefied remains of a wedding planner are found in a tanning bed on Valentine's Day, Cam pressures the team to work fast so she can spend the holiday with her boyfriend; Clark helps Hodgins realize the best gifts come from the heart.

A BMX rider's remains are discovered on the roof of a warehouse; Sweets asks Booth for advice; Booth plans a grand gesture to demonstrate his commitment to Hannah.

A dead man disguised as a scarecrow is found in a cornfield; Booth and Brennan question the victim's three wives, who are also sisters; Cam doubts her relationship.

The Jeffersonian team investigates when a notorious murderer known as ``The Gravedigger'' (Deirdre Lovejoy) is killed by a sniper.

A body is found in the shower of a home belonging to a young socialite; Hodgins and Angela talk about their future; Booth talks to Hannah about Brennan's feeling for him.

When a skull and decomposing hands are found in a dumpster, the team searches for the rest of the victim's remains; Brennan agrees to shoot an episode of a children's show with professor Bunsen, ``The Science Dude'' Jude (David Alan Grier).

Brennan and Booth head to the Jersey Shore when decomposed remains are discovered; the team becomes fond of Booth's girlfriend; Angela tries to keep a secret.

The remains of a couple are found in in a cave; Brennan re-evaluates her relationship with Booth when his girlfriend makes a surprise visit.

The team helps Cam solve the case of an unidentified boy; after making personal discoveries, the members of the team realize they belong in Washington, D.C.