Dexter Riley is a science student at Medfield College who inadvertently invents a liquid capable of rendering objects and people invisible. Before Dexter and his friends, Debbie and Richard Schuyler, can even enjoy their spectacular discovery, corrupt businessman A.J. Arno plots to get his greedy hands on it. Slapstick hijinks ensue as Dexter and his pals try to thwart the evil Arno before he can use the invisibility spray to rob a bank.
Kurt Russell
as Dexter Reilly
Cesar Romero
as A.J. Arno
Joe Flynn
as Dean Eugene (E.J.) Higgins
Jim Backus
as Timothy Forsythe
William Windom
as Professor Lufkin
Frank Welker
as Myles
Joyce Menges
as Debbie Dawson
Michael McGreevey
as Richard Schuyler
Richard Bakalyan
as Cookie
Alan Hewitt
as Dean Collingsgood
Kelly Thordsen
as Sgt. Cassidy
Bing Russell
as Alfred
