Unsolved Mysteries

Season 12

Host Robert Stack presides over an investigation into unsolved mysteries ranging from murders to UFO sightings. Through reenactments and interviews, viewers are presented with the known facts of each case. Anyone with additional information is then urged to contact the show's producers via a toll-free telephone number.
13 Episodes on Plex
  • Episode #449
    Episode #449Episode 1
  • Episode #450
    Episode #450Episode 2
  • Episode #451
    Episode #451Episode 3
  • Episode #452
    Episode #452Episode 4
  • Episode #453
    Episode #453Episode 5
  • Episode #454
    Episode #454Episode 6
  • Episode #455
    Episode #455Episode 7
  • Episode #456
    Episode #456Episode 8
  • Episode #457
    Episode #457Episode 9
  • Episode #458
    Episode #458Episode 10
  • Episode #459
    Episode #459Episode 11
  • Episode #460
    Episode #460Episode 12
  • Episode #461
    Episode #461Episode 13
All 55 Episodes
  • Episode #449
    Episode #449Episode 1
  • Episode #450
    Episode #450Episode 2
  • Episode #451
    Episode #451Episode 3
  • Episode #452
    Episode #452Episode 4
  • Episode #453
    Episode #453Episode 5
  • Episode #454
    Episode #454Episode 6
  • Episode #455
    Episode #455Episode 7
  • Episode #456
    Episode #456Episode 8
  • Episode #457
    Episode #457Episode 9
  • Episode #458
    Episode #458Episode 10
  • Episode #459
    Episode #459Episode 11
  • Episode #460
    Episode #460Episode 12
  • Episode #461
    Episode #461Episode 13
  • Episode #462
    Episode #462Episode 14
  • Episode #463
    Episode #463Episode 15
  • Episode #464
    Episode #464Episode 16
  • Episode #465
    Episode #465Episode 17
  • Episode #466
    Episode #466Episode 18
  • Episode #467
    Episode #467Episode 19
  • Episode #468
    Episode #468Episode 20
  • Episode #469
    Episode #469Episode 21
  • Episode #470
    Episode #470Episode 22
  • Episode #471
    Episode #471Episode 23
  • Episode #472
    Episode #472Episode 24
  • Episode #473
    Episode #473Episode 25
  • Episode #474
    Episode #474Episode 26
  • Episode #475
    Episode #475Episode 27
  • Episode #476
    Episode #476Episode 28
  • Episode #477
    Episode #477Episode 29
  • Episode #478
    Episode #478Episode 30
  • Episode #479
    Episode #479Episode 31
  • Episode #480
    Episode #480Episode 32
  • Episode #481
    Episode #481Episode 33
  • Episode #482
    Episode #482Episode 34
  • Episode #482
    Episode #482Episode 35
  • Episode #483
    Episode #483Episode 36
  • Episode #484
    Episode #484Episode 37
  • Episode #485
    Episode #485Episode 38
  • Episode #486
    Episode #486Episode 39
  • Episode #487
    Episode #487Episode 40
  • Episode #488
    Episode #488Episode 41
  • Episode #489
    Episode #489Episode 42
  • Episode #490
    Episode #490Episode 43
  • Episode #491
    Episode #491Episode 44
  • Episode #492
    Episode #492Episode 45
  • Episode #493
    Episode #493Episode 46
  • Episode #494
    Episode #494Episode 47
  • Episode #495
    Episode #495Episode 48
  • Episode #496
    Episode #496Episode 49
  • Episode #497
    Episode #497Episode 50
  • Episode #498
    Episode #498Episode 51
  • Episode #499
    Episode #499Episode 52
  • Episode #500
    Episode #500Episode 53
  • Episode #501
    Episode #501Episode 54
  • Episode #502
    Episode #502Episode 55
Cast of Season 12
  • Robert StackHost

Take Plex everywhere

Watch free anytime, anywhere, on almost any device.
See the full list of supported devices