Una pandilla de lunáticos: Reparto

Michael Keaton
Billy Caufield

Christopher Lloyd
Henry Sikorsky

Peter Boyle
Jack McDermott

Stephen Furst
Albert Ianuzzi

Dennis Boutsikaris
Dr. Weitzman

Lorraine Bracco
Riley

Milo O’Shea
Dr. Newald

Philip Bosco
O'Malley

James Remar
Gianelli

Jack Gilpin
Dr. Talmer

MacIntyre Dixon
Dr. Verboven
Bill Goffi
Singer / Accordionist

Jack Duffy
Bernie

Brad Sullivan
Sgt. Vincente

Larry Pine
Canning

Ron James
Dwight

Jihmi Kennedy
Tow Man

Freda Foh Shen
TV Newscaster