Lauren Ambrose
as Susan Wheeler
Natalie Knepp
as Hanna Goldberg
Michael Weston
as Peter Arno
Joe Morton
as Nelson
James Rebhorn
as Oren
Richard Dreyfuss
as Professor Hillside
James Woods
as Dr. Howard Stark
Ellen Burstyn
as Mrs. Emerson
Geena Davis
as Dr. Agnetta Lindquist
Steven Pasquale
as Mark Bellows