History's Greatest Mysteries is a U.S. television program shown on History since Saturday, November 14, 2020. History's Greatest Mysteries is currently the fourth most popular show on History and 195th overall on TV, watched by a total number of 244,000 people (0.08% rating, down -51% from August 18, 2025) as of the daily audience measurement on .
Demographic breakdown of the most recent historical ratings of History's Greatest Mysteries on History as of Monday, January 12, 2026.
| History's Greatest Mysteries Daily Ratings | |||
|---|---|---|---|
| Date | Demo | Audience | Rating |
| 2026-Jan-12 R+E-O+P-O | HH | 179,300 | 0.14 |
| P2+ | 244,000 | 0.08 | |
| 2025-Aug-18 83: LOST PLACES OF OLD TESTAMENT | HH | 365,000 | 0.29 |
| P2+ | 499,000 | 0.16 | |
| P18-49 | 69,000 | 0.05 | |
| P25-54 | 117,000 | 0.09 | |
| 2025-Aug-11 82: SECRETS OF EASTER ISLAND, THE | HH | 302,000 | 0.24 |
| P2+ | 369,000 | 0.12 | |
| P18-49 | 51,000 | 0.04 | |
| P25-54 | 73,000 | 0.06 | |
| 2025-Aug-04 81: LOST PIRATE TREASURE JEAN LAF | HH | 339,500 | 0.27 |
| P2+ | 419,000 | 0.13 | |
| P18-49 | 36,000 | 0.03 | |
| P25-54 | 67,000 | 0.05 | |
| 2025-Jul-28 80: SECRETS OF THE SPHINX | HH | 390,000 | 0.31 |
| P2+ | 504,000 | 0.16 | |
| P18-49 | 57,000 | 0.04 | |
| P25-54 | 118,000 | 0.10 | |
| 2025-Jul-21 77: PERCY FAWCETT AND THE LOST CI | HH | 352,000 | 0.28 |
| P2+ | 446,000 | 0.14 | |
| P18-49 | 57,000 | 0.04 | |
| P25-54 | 106,000 | 0.09 | |
| 2025-Jul-14 | HH | 377,500 | 0.30 |
| P2+ | 471,000 | 0.15 | |
| P18-49 | 67,000 | 0.05 | |
| P25-54 | 99,000 | 0.08 | |
| 2025-May-19 79: SECRETS OF THE COOPER SCROLL | HH | 302,000 | 0.24 |
| P2+ | 385,000 | 0.12 | |
| P18-49 | 56,000 | 0.04 | |
| P25-54 | 102,000 | 0.08 | |
| 2025-May-12 78: MISSING TESLA PAPERS, THE | HH | 339,500 | 0.27 |
| P2+ | 418,000 | 0.13 | |
| P18-49 | 64,000 | 0.05 | |
| P25-54 | 94,000 | 0.08 | |
| 2025-May-05 72: MISSING RICHES GENGHIS KHAN | HH | 314,500 | 0.25 |
| P2+ | 398,000 | 0.13 | |
| P18-49 | 75,000 | 0.06 | |
| P25-54 | 114,000 | 0.09 | |
| 2025-Apr-28 73: DEATH OF DILLINGER, THE | HH | 276,500 | 0.22 |
| P2+ | 343,000 | 0.11 | |
| P18-49 | 61,000 | 0.05 | |
| P25-54 | 105,000 | 0.09 | |
| 2025-Apr-21 74: SEARCH FOR ATLANTIS, THE | HH | 327,000 | 0.26 |
| P2+ | 437,000 | 0.14 | |
| P18-49 | 40,000 | 0.03 | |
| P25-54 | 88,000 | 0.07 | |
| 2025-Apr-14 75: AMAZING EVENTS BOOK OF EXODUS | HH | 352,000 | 0.28 |
| P2+ | 464,000 | 0.15 | |
| P18-49 | 76,000 | 0.06 | |
| P25-54 | 114,000 | 0.09 | |
| 2025-Mar-24 | HH | 390,000 | 0.31 |
| P2+ | 531,000 | 0.17 | |
| P18-49 | 67,000 | 0.05 | |
| P25-54 | 111,000 | 0.09 | |
| 2025-Mar-17 | HH | 327,000 | 0.26 |
| P2+ | 447,000 | 0.14 | |
| P18-49 | 67,000 | 0.05 | |
| P25-54 | 99,000 | 0.08 | |
| 2025-Mar-10 | HH | 402,500 | 0.32 |
| P2+ | 522,000 | 0.16 | |
| P18-49 | 67,000 | 0.05 | |
| P25-54 | 111,000 | 0.09 | |
| 2025-Mar-03 | HH | 390,000 | 0.31 |
| P2+ | 459,000 | 0.14 | |
| P18-49 | 53,500 | 0.04 | |
| P25-54 | 99,000 | 0.08 | |
| 2025-Feb-24 | HH | 365,000 | 0.29 |
| P2+ | 507,000 | 0.16 | |
| P18-49 | 53,500 | 0.04 | |
| P25-54 | 148,000 | 0.12 | |
| 2025-Feb-10 66: VALENTINES DAY MASSACRE | HH | 515,500 | 0.41 |
| P2+ | 718,000 | 0.23 | |
| P18-49 | 131,000 | 0.10 | |
| P25-54 | 199,000 | 0.16 | |
| 2025-Feb-03 65: FRANKLIN EXPEDITION, THE | HH | 377,500 | 0.30 |
| P2+ | 470,000 | 0.15 | |
| P18-49 | 53,000 | 0.04 | |
| P25-54 | 81,000 | 0.07 | |
| 2025-Jan-27 64 ROSWELL (P) | HH | 453,000 | 0.36 |
| P2+ | 561,000 | 0.18 | |
| P18-49 | 116,000 | 0.09 | |
| P25-54 | 141,000 | 0.11 | |
| 2024-Jul-15 | HH | 387,500 | 0.31 |
| P2+ | 526,000 | 0.17 | |
| P18-49 | 92,500 | 0.07 | |
| 2024-Jul-08 | HH | 562,500 | 0.45 |
| P2+ | 699,000 | 0.22 | |
| P18-49 | 105,500 | 0.08 | |
| 2024-Jul-01 | HH | 362,500 | 0.29 |
| P2+ | 479,000 | 0.15 | |
| P18-49 | 79,500 | 0.06 | |
| 2024-Jun-24 | HH | 387,500 | 0.31 |
| P2+ | 461,000 | 0.15 | |
| P18-49 | 92,500 | 0.07 | |
| 2024-Jun-17 | HH | 387,500 | 0.31 |
| P2+ | 524,000 | 0.17 | |
| P18-49 | 131,500 | 0.10 | |
| 2024-Jun-10 | HH | 462,500 | 0.37 |
| P2+ | 596,000 | 0.19 | |
| P18-49 | 92,500 | 0.07 | |
| 2024-Jun-03 | HH | 537,500 | 0.43 |
| P2+ | 665,000 | 0.21 | |
| P18-49 | 105,500 | 0.08 | |
| Rank | Program | Audience | Change |
|---|---|---|---|
| 1 | UnXplained | 648,700 | +81% |
| 2 | Monsterquest | 541,500 | +49% |
| 3 | Ancient Aliens | 476,900 | +73% |
| 4 | History's Greatest Mysteries | 244,000 | -51% |