Story Structure — 14 Plot Phases
Season 1: Foundations
Introduction to forensic methodologies including DNA, ballistics, and plant evidence. Early cases establish the series focus on scientific problem-solving in murder and environmental investigations.
Key Events
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Helle Crafts Conviction — First murder conviction without a body in Connecticut using forensic evidence. Characters: Detective
Location: Connecticut
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Magic Bullet Ballistics — Ballistics and laser reconstruction solved a stray bullet fatality. Characters: Detective
Location: Dallas
Season 2: Trace & Toxin
Expansion into fiber analysis, soil sampling, and toxicology. Cases highlight how microscopic clues and chemical poisoning unravel complex disappearances and serial crimes.
Key Events
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DNA First Use — First case to utilize Dr. Alec Jeffreys revolutionary DNA approach. Characters: Detective
Location: Leicester, England
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Plant DNA Conviction — First U.S. case where plant DNA linked suspect to crime scene. Characters: Detective
Location: Phoenix, Arizona
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DNA Profiling Serial Murder — First use of DNA profiling in a serial murder case, freeing innocent and convicting killer. Characters: Detective
Location: Virginia
Season 3: Identification & Disease
Focus on facial reconstruction, prion diseases, and bomb forensics. Investigators tackle missing persons and public health crises using emerging biological science.
Key Events
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DNA Profiling Serial Murder — First use of DNA profiling in a serial murder case, freeing innocent and convicting killer. Characters: Detective
Location: Virginia
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Legionnaires Outbreak — Scientists identified vector of deadly pneumonia-like disease. Characters: Detective
Location: Philadelphia
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Wilson Murder Reconstruction — Experts debated murder mechanics despite clear violence. Characters: Detective
Location: Unknown
Season 4: Blood & Fire
Intensive use of luminol, blood spatter, and arson investigation. Cases emphasize domestic violence, insurance fraud, and the critical role of behavioral profiling.
Key Events
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Cancer Cluster Investigation — Investigation into deadly cancer clusters linked to buried poisons. Characters: Detective
Location: Phoenix & Connecticut
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Insect Clues Desert — Insects proved vital in solving remote desert murders. Characters: Detective
Location: California
Season 5: Digital & Geographic
Integration of geographical profiling, computer forensics, and video testimony. The season marks a shift toward technological integration in suspect narrowing.
Key Events
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Thyroid Outbreak — Investigators linked high thyroid levels to dietary habits. Characters: Detective
Location: South Dakota
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John List Disappearance — Age-scaled bust aided public in identifying confessed murderer. Characters: Detective
Location: Ohio
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E-Coli Food Poisoning — Improperly cooked hamburger caused near-fatal E-Coli infection. Characters: Detective
Location: Unknown
Season 6: Cold Cases & Archives
Revival of stalled investigations using DNA databanks and digital imagery. Focus on historical crimes, insurance fraud, and the psychological toll of serial violence.
Key Events
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E-Coli Food Poisoning — Improperly cooked hamburger caused near-fatal E-Coli infection. Characters: Detective
Location: Unknown
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Red Fibers Serial Killer — Tiny red fibers at eight crime scenes led to serial killer. Characters: Detective
Location: Florida
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Soil Sample Analysis — Careful soil analysis revealed fate of missing couple. Characters: Detective
Location: Great Britain
Season 7: Behavioral & Cross-Border
Adoption of behavioral profiling, international cooperation, and advanced entomology. Cases span multiple jurisdictions and highlight the evolution of criminal psychology.
Key Events
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Killer Fog Accident — Investigators determined if deadly fog was natural or artificial. Characters: Detective
Location: Highway
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Ruby Morris DNA — Coast guard and scientists searched for missing wife, DNA surprised everyone. Characters: Detective
Location: Arizona
Season 8: Linguistics & Ballistics
Introduction of forensic linguistics, precise ballistics, and accident reconstruction. Investigators solve cases through document analysis and trajectory mapping.
Key Events
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Thallium Poisoning — Flu-like symptoms traced to thallium, determining accidental or murder. Characters: Detective
Location: Unknown
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Lamb Head Threat — Chilling sight on fence post prompted investigation. Characters: Detective
Location: Great Britain
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Fatal Fungus Infant — Rare lung bleeding condition in infants traced to environmental cause. Characters: Detective
Location: Cleveland
Season 9: Trace Mastery & Surveillance
Refinement of trace evidence analysis, end-match techniques, and security camera usage. Cases demonstrate meticulous attention to detail and technological surveillance.
Key Events
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Fatal Fungus Infant — Rare lung bleeding condition in infants traced to environmental cause. Characters: Detective
Location: Cleveland
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Charred Dumpster Fire — Sophisticated science found evidence in dumpster ashes. Characters: Detective
Location: Vancouver
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Cyanide Pills — Over-the-counter pills tainted with cyanide led to suspect. Characters: Detective
Location: Seattle
Season 10: Digital Enhancement & Pattern
Heavy reliance on digital video enhancement, database cross-referencing, and serial pattern recognition. The season highlights the power of data integration.
Key Events
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Stalker DNA — DNA analysis sealed stalker fate after hateful letters. Characters: Detective
Location: Pennsylvania
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Postal Bombings — Forensic science uncovered forgery and murder behind explosions. Characters: Detective
Location: Salt Lake City
Season 11: Micro-Trace & Cold Revival
Focus on microscopic trace evidence, cold case reopenings, and forensic anthropology. Investigators use advanced microscopy to solve decades-old mysteries.
Key Events
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Microscopic Water Clue — Microscopic evidence in water helped find missing boy. Characters: Detective
Location: Switzerland
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Milwaukee Parasites — Unexplained illness traced to parasites, not influenza. Characters: Detective
Location: Wisconsin
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Darlie Routier Blood — Blood spatter and behavioral profiling analyzed Darlie's story. Characters: Detective
Location: Texas
Season 12: Specialized Tech & Exoneration
Utilization of NASA-derived technology, canine behavior analysis, and dental forensics. Cases emphasize wrongful conviction corrections and specialized animal evidence.
Key Events
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Darlie Routier Blood — Blood spatter and behavioral profiling analyzed Darlie's story. Characters: Detective
Location: Texas
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Scott Dunn Luminol — Luminol revealed horrific violence scene without body. Characters: Detective
Location: Unknown
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Debora Green Fire — Ex-husband accounts and forensic analysis pointed to arson. Characters: Detective
Location: Kansas
Season 13: Political & Psychological
Investigation of high-profile political murders, psychological profiling, and forensic hypnosis. The season explores motive, deception, and advanced interrogation science.
Key Events
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Shirley Andronowich Cement — Forensic evidence proved husband innocent despite confession. Characters: Detective
Location: Unknown
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Melissa Brannen Fiber — Fiber analysis led police to suspect despite missing girl. Characters: Detective
Location: Unknown
Season 14: Landfill & Serial Resolution
Convergence of multiple missing persons cases through landfill discovery and suitcase forensics. DNA and mask evidence provide final resolutions to long-standing serial patterns.
Key Events
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Thallium Insurance — Police investigated wife collecting insurance for previous husband. Characters: Detective
Location: Pennsylvania
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Rope Style Arrest — Obscure rope style and forensic analysis led to arrest. Characters: Detective
Location: Nebraska
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Bite Mark Odontology — Forensic odontology and computer view identified killer. Characters: Detective
Location: Unknown
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Insurance Murder — New life insurance policy sparked murder suspicion. Characters: Detective
Location: Nova Scotia
Real crimes, disease outbreaks and accidents around the world are solved by experts using scientific laboratory analysis which helps them find previously undetectable evidence. Brilliant scientific work helps convict the guilty and free the innocent.