| 100% | RIPPER | 6 | Jack the __, unidentified London serial killer |
| 71% | RIPPER | 6 | Jack the __, London serial killer with unknown ID |
| 58% | RIPPER | 6 | Jack the __, killer in London's Victorian East End |
| 49% | RIPPER | 6 | Jack the __, anonymous Victorian killer |
| 45% | RIPPER | 6 | Soviet serial killer: Andrei Chikatilo: the Red __ |
| 44% | ASON | 4 | Jack London's "___ of the Sun" |
| 43% | THEWILD | 7 | Jack London's adventure story, The Call of __ |
| 42% | SPREE | 5 | Jack the Ripper is a murderer who went on a killing ___ in London |
| 42% | CALLOF | 6 | & 21A The —, 1903 novel by Jack London |
| 40% | IRON | 4 | The —, 1908 novel by Jack London featuring the character Ernest Everhard |
| 39% | BUCK | 4 | Dog from Jack London's "The Call of the Wild" |
| 39% | WHITE | 5 | & 20D 1906 Jack London novel featuring the character Grey Beaver |
| 39% | LEIGHEMERSON | 12 | Scary serial killer introduced in the "American Horror Story: Asylum" episode "Unholy Night" (2 wds.) |
| 39% | DEXTER | 6 | Showtime drama about a serial killer (2006-2013), or the main character's first name |
| 39% | HANNIBAL | 8 | NBC thriller about a serial killer (2013-present), or the main character's first name |
| 39% | SONOFTHEWOLF | 12 | The —, 1900 story collection by Jack London subtitled Tales of the Far North |
| 38% | LARSEN | 6 | Captain of the Ghost, in Jack London's "The Sea Wolf" |
| 38% | IRON | 4 | & 6D The —, 1908 novel by Jack London featuring the character Ernest Everhard |
| 37% | CSI | 3 | Show with the serial killer Rita Von Squeeze |
| 37% | YOU | 3 | Netflix series starring Penn Badgley as a serial killer that featured the Taylor Swift song "Anti-Hero" |
| 37% | SNOW | 4 | Serial killer? |
| 36% | RIPPER | 6 | Jack the __ |
| 36% | RIPPER | 6 | Jack the ___ |
| 36% | TOBUILDAFIRE | 12 | Jack London short story about survival in the Yukon Territory, and the goal of this puzzle? |
| 35% | CALL | 4 | "The ___ of the Wild" (Jack London novel) |
| 35% | CALL | 4 | "___ of the Wild" (Jack London novel) |