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