Kristy McNichol as Mary Groda-Lewis

Matt Clark as Fannie Groda

David Paymer as David Lewis

Rachel Ticotin as Rachel Martin

Piper Laurie as Christine Groda

Leslie Wing as Jill

Wayne Robson as Dr. Sitton

Dorothy Dells as Beatrice Symes

David Sage as Dr. Miller

Romy Walthall as Jeanine

Lycia Naff as Delia

David Faustino as Christopher

Sarah Partridge as Barbara

Ron Recasner as Bernard Fuller

Tamu Blackwell as Eugenia

Shana Lane-Block as Iris

Terry David Mulligan as Dr. Powers

Jackson Davies as Mr. Yates

Tom Heaton as Gerald Crowhurst

Kate Robbins as Jan

Sheila Moore as Dr. Hofflund

Todd Duckworth as Dr. Grovner

Tom McBeath as Dr. Pearl

Christianne Hirt as Natalie

Lossen Chambers as Tanya

Twyla-Dawn Vokins as Beth

Sharon Wahl as Secretary

Gabrielle Rose as Julie Trenton

Karen Elizabeth Austin as Proper Lady

Peter Yunker as Richard

Pam Dangelmaier as SDS Teenager

Stephen Chang as Karate Instructor

Frances Flanagan as Nurse Osco

Ruby Montgomery as Nurse Curtis

Joseph Golland as Dr. McWright

David Mitchelle as Optometrist

Robert Prowse as Soldier (uncredited)

Jacob Rupp as Driver (uncredited)