Episode Info

The CSI team investigates when a young coed, about to move back home, disappears without a trace from her campus dorm room. Even more curious, all of the girl's belongings were left behind. This and other baffling clues lead the crew to conclude that the case's solution may lie in the Chaos Theory, wherein seemingly harmless and unimportant events culminate in disaster. Originally scheduled to air on September 27, 2001, this episode was moved back one week due to network coverage of the 9/11 tragedy.


William L. Petersen
as Gil Grissom
Marg Helgenberger
as Catherine Willows
Gary Dourdan
as Warrick Brown
George Eads
as Nick Stokes
Paul Guilfoyle (II)
as Capt. Jim Brass
Jorja Fox
as Sara Sidle
Dale Midkiff
as Prof. Woodbury
Garrett M. Brown
as Mr. Rycoff
Sherry Hursey
as Mrs. Rycoff
Danielle Nicolet
as Jennifer Riggs
Shelby Fenner
as Paige Rycoff
Kate McNeil
as Mrs. Woodbury
Jon Hershfield
as ND Student
Archie Kao
as Campus Security Tech
Brent Sexton
as Mark Doyle
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Chaos Theory Photos