Julie St. Claire

The CSIs investigate when the parents of a baby sitter in an upscale neighborhood are murdered. As the team sorts through the neighbors' secrets and lies, they find an unexpected love triangle as a motive for murder. Meanwhile, a key piece of evidence found at the crime scene leads Horatio to expose a doctor with some dirty secrets of his own. (TV_PG)

A policeman-turned-professor challenges Jessica to solve a series of campus muggings that soon escalates to murder.

The detectives investigate a strangulation murder that may be tied to one of Diane Russell’s cases; Russell consults a doctor when she discovers a lump in her breast; and Medavoy and Jones investigate an arson linked to two boys.

Zack meets a college girl and tells her he goes to USC and is studying photojournalism. Screech makes fake IDs and the guys sneak out to meet her at the over-18 nightclub "The Attic." They're in for a surprise when it turns out Kelly's boyfriend Jeff also likes hanging out there...without Kelly.

Matt (Daniel Cosgrove) is forced to choose between Kelly and his wife (Jennie Garth, guest star Cari Shayne); Dylan and Gina (Luke Perry, Vanessa Marcil) have sex in perilous places; romance is rekindled for Donna and David (Tori Spelling, Brian Austin Green).