Jason's ghost.

Riverdale (2017) - Chapter Sixty-One: Halloween (S04E04)

Title	Season	Episode
Chapter Ten: The Lost Weekend	1	10
Chapter Twelve: Anatomy of a Murder	1	12
Chapter Thirteen: The Sweet Hereafter	1	13
Chapter Fifteen: Nighthawks	2	2
Chapter Sixteen: The Watcher in the Woods	2	3
Chapter Seventeen: The Town That Dreaded Sundown	2	4
Chapter Eighteen: When a Stranger Calls	2	5
Chapter Nineteen: Death Proof	2	6
Chapter Twenty: Tales from the Darkside	2	7
Chapter Twenty-One: House of the Devil	2	8
Chapter Twenty-Two: Silent Night, Deadly Night	2	9
Chapter Twenty-Three: The Blackboard Jungle	2	10
Chapter Twenty-Four: The Wrestler	2	11
Chapter Twenty-Five: The Wicked and the Divine	2	12
Chapter Twenty-Six: The Tell-Tale Heart	2	13
Chapter Twenty-Seven: The Hills Have Eyes	2	14
Chapter Twenty-Eight: There Will Be Blood	2	15
Chapter Twenty-Nine: Primary Colors	2	16
Chapter Thirty: The Noose Tightens	2	17
Chapter Thirty-One: A Night to Remember	2	18
Chapter Thirty-Two: Prisoners	2	19
Chapter Thirty-Three: Shadow of a Doubt	2	20
Chapter Thirty-Four: Judgment Night	2	21
Chapter Thirty-Five: Brave New World	2	22
Chapter Thirty-Six: Labor Day	3	1
Chapter Thirty-Seven: Fortune and Men's Eyes	3	2
Chapter Thirty-Eight: As Above, So Below	3	3
Chapter Thirty-Nine: The Midnight Club	3	4
Chapter Forty: The Great Escape	3	5
Chapter Forty-One: Manhunter	3	6
Chapter Forty-Two: The Man in Black	3	7
Chapter Forty-Three: Outbreak	3	8
Chapter Forty-Four: No Exit	3	9
Chapter Forty-Five: The Stranger	3	10
Chapter Forty-Six: The Red Dahlia	3	11
Chapter Forty-Seven: Bizarrodale	3	12
Chapter Forty-Eight: Requiem for a Welterweight	3	13
Chapter Forty-Nine: Fire Walk with Me	3	14
Chapter Fifty: American Dreams	3	15
Chapter Fifty-One: Big Fun	3	16
Chapter Fifty-Two: The Raid	3	17
Chapter Fifty-Three: Jawbreaker	3	18
Chapter Fifty-Four: Fear the Reaper	3	19
Chapter Fifty-Five: Prom Night	3	20
Chapter Fifty-Six: The Dark Secret of Harvest House	3	21
Chapter Fifty-Seven: Survive the Night	3	22
Chapter Fifty-Eight: In Memoriam	4	1
Chapter Fifty-Nine: Fast Times at Riverdale High	4	2
Chapter Sixty: Dog Day Afternoon	4	3
Chapter Sixty-One: Halloween	4	4
Chapter Sixty-Two: Witness for the Prosecution	4	5
Chapter Sixty-Three: Hereditary	4	6
Chapter Sixty-Four: The Ice Storm	4	7
Chapter Sixty-Five: In Treatment	4	8
Chapter Sixty-Six: Tangerine	4	9
Chapter Sixty-Seven: Varsity Blues	4	10
Chapter Sixty-Eight: Quiz Show	4	11
Chapter Sixty-Nine: Men of Honor	4	12
Chapter Seventy: The Ides of March	4	13
Chapter Seventy-One: How to Get Away with Murder	4	14
Chapter Seventy-Two: To Die For	4	15
Chapter Seventy-Three: The Locked Room	4	16
Chapter Seventy-Four: Wicked Little Town	4	17
Chapter Seventy-Five: Lynchian	4	18
Chapter Seventy-Six: Killing Mr. Honey	4	19
Chapter Seventy-Seven: Climax	5	1
Chapter Seventy-Eight: The Preppy Murders	5	2
Chapter Seventy-Nine: Graduation	5	3
Chapter Eighty: Purgatorio	5	4
Chapter Eighty-One: The Homecoming	5	5
Chapter Eighty-Two: Back to School	5	6
Chapter Eighty-Three: Fire in the Sky	5	7
Chapter Eighty-Four: Lock & Key	5	8
Chapter Eighty-Five: Destroyer	5	9
Chapter Eighty-Six: The Pincushion Man	5	10
Chapter Eighty-Seven: Strange Bedfellows	5	11
Chapter Eighty-Eight: Citizen Lodge	5	12
Chapter Eighty-Nine: Reservoir Dogs	5	13
Chapter Ninety: The Night Gallery	5	14
Chapter Ninety-One: The Return of the Pussycats	5	15
Chapter Ninety-Two: Band of Brothers	5	16
Chapter Ninety-Three: Dance of Death	5	17
Chapter Ninety-Four: Next to Normal	5	18
Chapter Ninety-Five: RIVERDALE: RIP (?)	5	19