A ghost tells Melinda about a secret munitions dump containing unexploded bombs, and then reveals that one of the bombs is missing and that someone will die as a result.

Addison, Pete and Sam must work together on a complicated case involving a father-to-be who comes down with tuberculosis; Sheldon’s helps one of Violet’s patients get over her fear of flying.

Michael is approached by his alter ego – the man who actually commited the crimes that were used to burn him.

Jane and his crew investigate the murder of a prominent chef, Gabriel Barge.

When famous surgeon Dr. Harper Avery is rushed to Seattle Grace-Mercy West, the staff is surprised to discover that one of their own is related to this legend, and his unorthodox request for his surgery causes tensions t between Derek and Richard. Meanwhile Callie and Arizona try to help Teddy and Sloan move on from their pasts and find greener pastures.

It’s delivery time for Pam when her contractions begin. She and Jim scramble to the hospital, the staffers try to comfort her with food and entertainment, and Michael nervously anticipates the birth. Back at the office, Erin has lunch with Kevin, triggering jealousy in Andy. Linda Purl guest stars.

Four contestants are eliminated.

Ron wins a “Woman of the Year” award for a project Leslie started, and she’s not happy about it. Meanwhile, Tom decides he wants to invest in a local club

Jeff’s will is tested in his new billiards class; Abed tries to woo a potential mate by bringing out different sides of his personality.

When a band member of Rascal Flatts is electrocuted by his own guitar during a concert, the CSI team investigates if it was a case of foul play.

Series finale: Sean and Christian reflect on their relationship. Ava Moore: Famke Janssen. Brandy Henry: Melanie Griffith. Joan Rivers plays herself..

When the gym suddenly begins to become profitable, Christine and Barb find themselves coming into a lot of money. Barb decides to give to charity, and Christine must make the tough decision between splurging on a designer dress or following Barb’s lead.

After Lassiter takes a page out of Shawn’s book and claims a shark attack victim was actually murdered, the guys must then scramble to find the fish and prove him right. Guest starring Jeri Ryan.

The team investigates the particularly gruesome outcome of a 21st birthday where the party plans became all but anything worth celebrating. With just a few and not easy answers as their only lead in the case, the CSis are challenged to stretch their abilities to the limit.

Benson and Stabler investigate the murders of young prostitutes who are found with homemade prayer cards attached to their bodies. Benson then gets emotionally involved in the case after one victim (Mischa Barton) survives.

Top 10 Female Semifinalists Perform

The team profiles a child abductor who may have been keeping children for more than eight years.

Excited to own her first home, Laurie needs a cosigner to get a loan, but realizes her mother (Beverly D’Angelo) won’t be of much help. Meanwhile, Bobby gets robbed, and Travis helps Barb after a surgical procedure.

In the aftermath of a traumatic event, Veronica spontaneously departs on a road trip with a troubled visitor, leaving her coworkers worried about her safety. At Mercy, a horrific bus bombing results in a chaotic ER, with a clashing Briggs (James Van Der Beek) and Sands scrambling for available space. Meanwhile, Chloe suffers from a hangover; Sonia tries to keep her infidelity a secret. Alison Sweeney and Connor Paolo guest star.

Phil tries to conquer his fear of the dark when he and Luke go on a discovery expedition underneath the house; Mitchell and Cameron invite Lily’s pediatrician over for brunch.