Jim Belushi as Nick Dimas

Liza Minnelli as Stevie Merrill

Michael S. O'Rourke as Kirk O'Brien (as Michael O'Rourke)

James Brolin as Professor Spencer Jones

Helen Slater as Elsa Freedman

LeVar Burton as Dr. Franklin Carter

Jack Klugman as Senator Robert Ferguson

Grant Varjas as Grayson Stone

Patricia Wettig as Rebecca Ferguson Stone

Ben Gazzara as Charlie Duke

Mira Sorvino as Matty Derosa

Lindsay Crouse as Una Pace

Paul Sorvino as Ed Starling

Matthew Perry as Willie Morrison

David Lansbury as Tim Farley

JoBeth Williams as Winnie Winslow

Ally Sheedy as Louise

Jill Eikenberry as Lula Sparks

Treat Williams as Peter Barnum

Dudley Moore as Imaginary Friend / President Andrews

Gena Rowlands as Francie Pomerantz

Zosia Mamet as Shannon

Liza Dicconson as Female Lover

Timothy Mineau as Male Lover

Alan Feinstein as Dan Merrill

Robert Wagner as Sheriff