David Irving Director Brian Robbins Steve Williams Actor Bill Calvert Kevin Actor Gerrit Graham Bud Oliver, Bud the C.H.U.D. Actor Tricia Leigh Fisher Katie Actor Robert Vaughn Colonel Masters Actor Larry Cedar Graves Actor Bianca Jagger Velma Actor Larry Linville Dr. Jewell Actor Judd Omen Sam Actor Jack Riley Wade Actor Jonathan D. Krane Producer Lawrence Kasanoff Executive Producer Arnie Sirlin Cinematographer