Craig T. Nelson as Steve Freeling

JoBeth Williams as Diane Freeling

Beatrice Straight as Dr. Lesh

Dominique Dunne as Dana Freeling

Oliver Robins as Robbie Freeling

Heather O'Rourke as Carol Anne Freeling

Michael McManus as Ben Tuthill

Virginia Kiser as Mrs. Tuthill

Martin Casella as Dr. Marty Casey

Richard Lawson as Ryan

Zelda Rubinstein as Tangina Barrons

James Karen as Mr. Teague

Lou Perryman as Pugsley

Clair E. Leucart as Bulldozer Driver

Dirk Blocker as Jeff Shaw

Allan Graf as Neighbor

Joseph Walsh as Neighbor

Helen Baron as Woman Buyer

Noel Conlon as Husband

Robert Broyles as Pool Worker

Sonny Landham as Pool Worker

Frank Welker as Additional Dialogue Replacement (voice)

William Vail as Implosion Man

Craig Simmons as Implosion Man