A homicide detective teams up with an evolutionary biologist to hunt a giant creature that is killing people in a Chicago museum.

Penelope Ann Milleras Dr. Margo Green
Tom Sizemoreas Lt. Vincent D'Agosta
Linda Huntas Dr. Ann Cuthbert
James Whitmoreas Dr. Albert Frock
Clayton Rohneras Det. Hollingsworth
Chi Muoi Loas Dr. Greg Lee
Robert Lesseras Mayor Robert Owen
Diane Robinas The Mayor's Wife
Lewis van Bergenas John Whitney
Peter Hyams