| 1 | It Takes a Killer Season 1 Episode 104 – A Killer Hand | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 103 – Missing in Minnesota | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 102 – Lone Star Killer | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 101 – Targeted Teacher | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 100 – Nameless in New Jersey | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 99 – Cold Storage Killer | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 98 – Bayou Strangler | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 97 – The Informant | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 96 – The Missing Pendant | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 95 – New Orleans Massacre | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 94 – Cleveland Killer | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 93 – Rhode Island Ripper | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 92 – Killer Handyman | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 91 – Fatal Secrets | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 90 – Six Degrees of Serial Murder | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 89 – An Axe to Grind | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 88 – A Coldblooded Cover Up | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 87 – The Son of Sam | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 86 – Lethal Payback | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 85 – Of Disbelief & Death | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 84 – Of Disbelief & Death | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 83 – Process of Elimination | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 82 – Blood on the Chef’s Apron | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 81 – Mrs. Wrong | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 80 – A Preference for Poison | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 79 – Rage & Anger | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 78 – Mother Knows Death | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 77 – They’ll Never Find Her Body | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 76 – Brothers in Arms/Menendez Brothers | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 75 – Down in Flames | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 74 – Cheat, Kill, Deny | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 73 – The Clear Lake Murders | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 72 – Mad Maksim | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 71 – Too Late to Say Sorry | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 70 – Blood Thicker Than Marriage | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 69 – The Snitch Who Kills | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 68 – The Green Widow | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 67 – The Burial He Wanted | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 66 – Menace to Society | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 65 – Bodyparts in My Pocket | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 64 – Dreaming of Murder | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 63 – The Grim Sleeper | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 62 – What Happened to Jana? | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 61 – The Poughkeepsie Predator | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 60 – A Split Personality | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 59 – Spoiled, Rotten & Ruthless | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 58 – Murderous Ambition | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 57 – Fred Neulander-Killer Rabbi | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 56 – The Bad Son | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 55 – The Honeybee Killer | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 54 – Of Vengeance & Murder | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 53 – Bonded in Murder | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 52 – Homicide in the High Desert | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 51 – If the Walls Could Talk | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 50 – The Keyes to Murder | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 49 – Enforcer of Death | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 48 – The Devil Next Door | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 47 – A Random Rampage | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 46 – Killer Cabbie | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 45 – The Acid Lady | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 44 – The Toy Box | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 43 – Seduced to Death | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 42 – Redneck Retribution | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 41 – Fit to Kill | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 40 – Episode 40 | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 39 – Doctor Death | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 38 – An Opportunity to Kill | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 37 – The Slavemaster | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 36 – Murderous Miranda | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 35 – A Wolf in Woman’s Clothing | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 34 – The House of Horrors | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 33 – Master Bob | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 32 – Terror on the Strip | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 31 – In Search of a Kill | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 30 – The Venomous Veterinarian | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 29 – Partners in Evil | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 28 – The Happy Face Killer | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 27 – Of Muscles and Murder | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 26 – Trailer Park Tragedy | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 25 – A Son Snaps | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 24 – Author of Death | | 2 | 6 years |
| It Takes a Killer Season 1 Episode 23 – Murder for Millions | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 22 – The Fast Food Killer | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 21 – A Woman Scorned | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 20 – The Con Artist Killers | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 19 – The Gainesville Ripper | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 18 – The Sadist of San Luis Obispo | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 17 – Oscar Pistorius | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 16 – The Preacher, His Mistress, and Murder | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 15 – The Vampire Teens | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 14 – The Mutilator of Baton Rouge | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 13 – A Stalker Strikes | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 12 – A Wife Goes Missing | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 11 – The Green River Killer | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 10 – The Casanova Killer | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 9 – Stephanie Lazarus | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 8 – The Ghost of Baton Rouge | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 7 – Bind, Torture, Kill | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 6 – Deaths in the Family | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 5 – Phil Spector | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 4 – A Treacherous Triangle | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 3 – Jodi Arias | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 2 – Chandra Levy | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 1 – The Craigslist Killer | | 0 | 6 years |
| It Takes a Killer Season 1 Episode 0 – | | 0 | 6 years |
