Donald Pleasence as Father Loomis

Lisa Blount as Catherine Danforth

Victor Wong as Prof. Howard Birack

Jameson Parker as Brian Marsh

Dennis Dun as Walter

Susan Blanchard as Kelly

Anne Marie Howard as Susan Cabot

Ann Yen as Lisa

Ken Wright as Lomax

Dirk Blocker as Mullins

Jessie Lawrence Ferguson as Calder

Peter Jason as Dr. Paul Leahy

Robert Grasmere as Frank Wyndham

Thom Bray as Etchinson

Joanna Merlin as Bag Lady

Alice Cooper as Street Schizo

Betty Ramey as Nun