An octogenarian woman, living in squalor surrounded by cats, is found stabbed to death in her decaying house. Grissom (Gil Gerard) and Catherine (Marg Helgenberger) have quite an aromatic time investigating this particular homicide. Meanwhile, two other CSI members, Nick (George Eads) and Sara (Jorja Fox), examine the evidence in a car bombing that may have been pulled off to cover up an earlier killing. ~ Hal Erickson, Rovi