Julie St. Claire

A policeman-turned-professor (Wings Hauser) challenges Jessica (Angela Lansbury) to solve a series of campus muggings that soon escalates to murder. Guest stars: Roxie Roker, Alan Oppenheimer.

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.

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)

Lauren moves into the Walsh house; Steve's idea for his paper leads to an alert about a potential health problem; Donna agrees to pose as David's girlfriend at a business function; Gina worries she can't keep pace with Dylan.