Albert (as Benjamin James Stockham)
Miranda
Riley
Colonel Ryneheart
Dr. Keller
Jenny
Elijah (as Robert Scott Crane)
Simon / Sarah / Bruce the Chimps (as Denise Cheshire-Pearlman)
Dr. Sinclaire
Narrator (voice)
Bill the Anchor
News Anchor
Detective Rome (as Juliano Brotman)
Krystal
Cherry
Dr. Sheville / Simon 2 / Sarah 2 / Bruce 2 the Chimps
Lab Security Guard
Detective Washington
Pizza Delivery Guy (uncredited)
Jenny (uncredited)
Protester (uncredited)