6.49 avg 7 episodes 5.9 → 6.6 88 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | The Final Hunt For D.B. Cooper | 5.9 | 157 |
| 2 | Titanic's Lost Evidence | 7.4 | 139 |
| 3 | Endurance: The Hunt for Shackleton's Ice Ship | 6.3 | 131 |
| 4 | The Escape of John Wilkes Booth | 6.1 | 106 |
| 5 | Roswell: The First Witness Part 1 - The Journal | 6.5 | 103 |
| 6 | Roswell: The First Witness Part 2 - The Memo | 6.6 | 90 |
| 7 | Roswell: The First Witness Part 3 - The Writer | 6.6 | 91 |
6.80 avg 4 episodes 6.7 → 7.3 83 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Expedition Bermuda Triangle | 6.7 | 93 |
| 2 | Hunting Hitler's U-Boats | 6.0 | 94 |
| 3 | The Death of Bruce Lee | 7.2 | 117 |
| 4 | Houdini's Lost Diaries | 7.3 | 97 |
7.20 avg 13 episodes 7.2 → 6.2 42 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | The Amber Room | 7.2 | 100 |
| 2 | The Disappearance of Jimmy Hoffa | 7.3 | 99 |
| 3 | The Dyatlov Pass Incident | 7.3 | 111 |
| 4 | The Body on Somerton Beach | 7.4 | 94 |
| 5 | The Amityville Horror | 7.1 | 96 |
| 6 | The Holy Grail | 7.0 | 90 |
| 7 | Malaysia Flight 370 | 7.5 | 97 |
| 8 | The Sodder Children Disappearance | 7.1 | 102 |
| 9 | The Voynich Manuscript | 7.1 | 91 |
| 10 | Jack the Ripper | 7.5 | 97 |
| 11 | Lindbergh Baby Kidnapping | 7.5 | 88 |
| 12 | The Chicago Tylenol Murders | 7.4 | 87 |
| 13 | Shackleton's Endurance: The Lost Ice Ship Found | 6.2 | 49 |
6.96 avg 25 episodes 6.9 → 7.0 40 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | The Loch Ness Monster | 6.9 | 107 |
| 2 | Who is the Zodiac Killer? | 7.2 | 93 |
| 3 | The Assassination of JFK | 6.7 | 95 |
| 4 | The Lost Colony of Roanoke | 7.2 | 85 |
| 5 | The Phoenix Lights Phenomenon | 6.5 | 88 |
| 6 | The Ark of the Covenant | 6.9 | 88 |
| 7 | The "Missingest" Man in America | 6.8 | 80 |
| 8 | Blackbeard's Lost Treasure | 6.9 | 83 |
| 9 | Decoding the Mysterious Antikythera Mechanism | 7.1 | 83 |
| 10 | The Puzzling Pyramids of Egypt | 6.7 | 80 |
| 11 | The Hunt for Stolen Nazi Treasure | 7.1 | 80 |
| 12 | The Deadly Bermuda Triangle | 6.8 | 79 |
| 13 | The Search for Noah's Ark | 6.4 | 82 |
| 14 | Who is D.B. Cooper? | 7.2 | 77 |
| 15 | The Legend of Bigfoot | 6.7 | 76 |
| 16 | Unlocking the Secrets of Stonehenge | 7.1 | 72 |
| 17 | The Search for El Dorado | 7.2 | 72 |
| 18 | The Mysterious Havana Syndrome | 6.5 | 64 |
| 19 | Unlocking the Secrets of the Nazca Lines | 7.1 | 68 |
| 20 | The Hunt for Cleopatra's Missing Tomb | 7.7 | 64 |
| 21 | TWA Flight 800 | 7.6 | 62 |
| 22 | The Hunt for Hitler | 6.6 | 65 |
| 23 | The Lost Gold of WWII | 7.0 | 64 |
| 24 | The Black Dahlia | 7.1 | 60 |
| 25 | Gardner Museum Robbery | 7.0 | 65 |
7.29 avg 15 episodes 7.2 → 7.2 40 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Montezuma's Lost Treasure | 7.2 | 65 |
| 2 | The Garden of Eden | 6.6 | 68 |
| 3 | The Lost Fortune of the Knights Templar | 7.1 | 58 |
| 4 | Shroud of Turin | 7.1 | 67 |
| 5 | Captain Kidd's Treasure | 6.9 | 58 |
| 6 | Escape from Alcatraz | 7.7 | 63 |
| 7 | The Battle of Los Angeles | 7.1 | 61 |
| 8 | The Mystery of Machu Picchu | 7.6 | 61 |
| 9 | Who Killed King Tut? | 7.2 | 57 |
| 10 | The Hindenburg Disaster | 7.6 | 58 |
| 11 | The Search for Alexander the Great | 7.2 | 51 |
| 12 | The Sinking of the Titanic | 7.9 | 57 |
| 13 | The Legend of the Lost Dutchman's Mine | 7.3 | 54 |
| 14 | The Assassination of RFK | 7.7 | 60 |
| 15 | The Salem Witch Trials | 7.2 | 52 |
7.22 avg 20 episodes 7.2 → 6.8 40 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Roswell | 7.2 | 62 |
| 2 | The Franklin Expedition | 7.7 | 58 |
| 3 | The Valentine's Day Massacre | 7.1 | 52 |
| 4 | What is the Yeti? | 6.8 | 55 |
| 5 | The Final Flight of Amelia Earhart | 7.6 | 53 |
| 6 | The Death and Fortune of Pablo Escobar | 6.8 | 45 |
| 7 | The Lost Loot of Jesse James | 7.3 | 54 |
| 8 | The Rendlesham Forest Incident | 7.0 | 53 |
| 9 | The Amazing Events of the Book of Exodus | 6.9 | 43 |
| 10 | The Search for Atlantis | 7.4 | 46 |
| 11 | The Death of Dillenger | 6.9 | 45 |
| 12 | The Missing Riches of Genghis Khan | 7.7 | 39 |
| 13 | The Missing Tesla Papers | 7.2 | 47 |
| 14 | Secrets of the Copper Scroll | 6.9 | 45 |
| 15 | The Killing of Bugsy Siegel | 7.0 | 46 |
| 16 | Percy Fawcett and the Lost City of Z | 7.3 | 40 |
| 17 | Secrets of the Sphinx | 7.6 | 47 |
| 18 | The Lost Pirate Treasure of Jean Lafitte | 7.4 | 40 |
| 19 | The Secrets of Easter Island | 7.8 | 43 |
| 20 | Lost Places of the Old Testament | 6.8 | 40 |
7.37 avg 20 episodes 7.8 → 8.0 40 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Area 51 | 7.8 | 45 |
| 2 | Hunt for Adolf Eichmann: Case Closed | 7.8 | 46 |
| 3 | Legend of the Werewolf | 6.9 | 36 |
| 4 | The Theft of the Mona Lisa: Case Closed | 7.9 | 38 |
| 5 | The Hunt for the Kraken | 7.1 | 33 |
| 6 | The Murder of Sam Giancana | 7.1 | 32 |
| 7 | The Unabomber: Case Closed | 7.9 | 34 |
| 8 | Who is the Boston Strangler | 7.3 | 34 |
| 9 | The Plot to Kill Lincoln | 7.3 | 30 |
| 10 | The Hunt for El Chapo: Case Closed | 7.6 | 28 |
| 11 | What Killed Bruce Lee? | 7.3 | 32 |
| 12 | The Hunt for Viking Treasure | 7.2 | 24 |
| 13 | The Lufthansa Heist | 7.3 | 19 |
| 14 | Foo Fighters: WWII Edition | 7.5 | 21 |
| 15 | The Search for Rommel's Gold | 7.5 | 23 |
| 16 | The Shot Heard Round the World | 7.0 | 15 |
| 17 | The Death of Alexander the Great | 6.8 | 16 |
| 18 | Lost Civil War Gold | 6.9 | 16 |
| 19 | The 2001 Anthrax Attacks | 7.2 | 18 |
| 20 | The Hunt for Osama bin Laden | 8.0 | 15 |
