Top Billed Cast

1. 

   Brian Dennehy

   John Wayne Gacy

2. 

   Michael Riley

   Joe 'Polock' Kozenczak

3. 

   Margot Kidder

   Rachel Grayson

4. 

   Meg Foster

   Linda Carlson

5. 

   Martin Julien

   Ted Koslo

6. 

   Scott Hylands

   Mike Paxton

7. 

   John Boylan

   Atkins

8. 

   David Eisner

   Williams

9. 

   Tony De Santis

   DeMarco

10. 

    Mark Humphrey

    King

11. 

    Gary Reineke

    Petrie

12. 

    Tim Progosh

    Morris

13. 

    Danny Pawlick

    Santori

14. 

    Bruce Ramsay

    Bragg

15. 

    Brenda Bazinet

    Alice Pearson

16. 

    Liliane Clune

    Marcia Kozenczak

17. 

    Toby Proctor

    Michael Kozenczak

18. 

    Christopher Marren

    Billy

19. 

    Gerry Quigley

    Walden

20. 

    Nicholas Pasco

    Barton

21. 

    Michael Copeman

    Chief Cameron

22. 

    James Kee

    Hoskins

23. 

    Brigette Lawson

    Pam

24. 

    Jay Brazeau

    Jake Burns

25. 

    Cynthia Preston

    Cindy Beck

26. 

    Andrew Gillies

    Vincent Austin

27. 

    Kurt Reis

    Waldron

28. 

    Judith Goodwin

    Mrs. Gant

29. 

    Shawn Lawrence

    Mr. Gant

30. 

    Jacqueline Graham

    Lorna Gant

31. 

    Nicholas Shields

    Christopher Gant

32. 

    Sarah Gibney

    Lisa Kozenczak

33. 

    Aviva Magner

    Debbie Kozenczak

34. 

    Maureen McRae

    Mrs. Trask

35. 

    Timm Zemanek

    Mr. Trask

36. 

    Maria Ricossa

    Helen Gacy

37. 

    Darryl Palmer

    Sheriff

38. 

    Peter Langley

    Mr. Miklovich

39. 

    John Friesen

    Detective #1

40. 

    Ray Paisley

    Illinois K-9 Officer

41. 

    Brett Halsey

    Stan Wilder

42. 

    Elliott Smith

    Gas Station Attendant

43. 

    David Gardner

    Judge

44. 

    David Bolt

    Asst. Principal Burke

45. 

    Thomas Hauff

    Foreman Hendricks

46. 

    David McAree

    Older Worker

47. 

    J. Winston Carroll

    Sergeant on Wabash Ave.

48. 

    Don Ritchie

    Detective on Shakespeare Ave.

49. 

    Rudy Webb

    Cemetery Staffer

50. 

    Robbie Rox

    Cicero Bar Owner

51. 

    Larry Reynolds

    Finger Lake Proprietor

52. 

    Veliko Pajkovic

    Man at Bus Station

53. 

    John Granik

    Narrator (voice)

54. 

    Luis Guzmán

    Waiter (uncredited)

55. 

    Peter Kerenyi

    Pool Player (uncredited)