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.
21 Episodes on Plex
  • Episode #308
    Episode #308Episode 1
  • Episode #309
    Episode #309Episode 2
  • Episode #310
    Episode #310Episode 3
  • Episode #311
    Episode #311Episode 4
  • Episode #312
    Episode #312Episode 5
  • Episode #313
    Episode #313Episode 6
  • Episode #314
    Episode #314Episode 7
  • Episode #315
    Episode #315Episode 8
  • Episode #316
    Episode #316Episode 9
  • Episode #317
    Episode #317Episode 10
  • Episode #318
    Episode #318Episode 11
  • Episode #319
    Episode #319Episode 12
  • Episode #320
    Episode #320Episode 13
  • Episode #321
    Episode #321Episode 14
  • Episode #322
    Episode #322Episode 15
  • Episode #323
    Episode #323Episode 16
  • Episode #324
    Episode #324Episode 17
  • Episode #325
    Episode #325Episode 18
  • Episode #326
    Episode #326Episode 19
  • Episode #327
    Episode #327Episode 20
  • Episode #328
    Episode #328Episode 21
All 40 Episodes
  • Episode #308
    Episode #308Episode 1
  • Episode #309
    Episode #309Episode 2
  • Episode #310
    Episode #310Episode 3
  • Episode #311
    Episode #311Episode 4
  • Episode #312
    Episode #312Episode 5
  • Episode #313
    Episode #313Episode 6
  • Episode #314
    Episode #314Episode 7
  • Episode #315
    Episode #315Episode 8
  • Episode #316
    Episode #316Episode 9
  • Episode #317
    Episode #317Episode 10
  • Episode #318
    Episode #318Episode 11
  • Episode #319
    Episode #319Episode 12
  • Episode #320
    Episode #320Episode 13
  • Episode #321
    Episode #321Episode 14
  • Episode #322
    Episode #322Episode 15
  • Episode #323
    Episode #323Episode 16
  • Episode #324
    Episode #324Episode 17
  • Episode #325
    Episode #325Episode 18
  • Episode #326
    Episode #326Episode 19
  • Episode #327
    Episode #327Episode 20
  • Episode #328
    Episode #328Episode 21
  • Episode #329
    Episode #329Episode 22
  • Episode #330
    Episode #330Episode 23
  • Episode #331
    Episode #331Episode 24
  • Episode #332
    Episode #332Episode 25
  • Episode #333
    Episode #333Episode 26
  • Episode #334
    Episode #334Episode 27
  • Episode #335
    Episode #335Episode 28
  • Episode #336
    Episode #336Episode 29
  • Episode #337
    Episode #337Episode 30
  • Episode #338
    Episode #338Episode 31
  • Episode #339
    Episode #339Episode 32
  • Episode #340
    Episode #340Episode 33
  • Episode #341
    Episode #341Episode 34
  • Episode #342
    Episode #342Episode 35
  • Episode #343
    Episode #343Episode 36
  • Episode #344
    Episode #344Episode 37
  • Episode #345
    Episode #345Episode 38
  • Episode #346
    Episode #346Episode 39
  • Episode #347
    Episode #347Episode 40
Cast of Season 7
  • Robert StackHost

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