Barry Fisher is Crime Laboratory Director for the Los Angeles County Sheriff's Department and has worked in various sections within the lab since starting in 1969. He is a distinguished fellow and past president of the American Academy of Forensic Sciences and served as president of the American Society of Crime Laboratory Directors (ASCLD) and the International Association of Forensic Sciences. He is a past chair of the ASCLD Laboratory Accreditation Board. He is a member of several other organizations, including the International Association for Identification, International Association of Chiefs of Police, the California Association of Criminalists, and others. He holds a BS in chemistry from City College of New York, an MS in organic chemistry from Purdue University, and an MBA from California State University, Northridge. He is author of the popular textbook, "Techniques of Crime Scene Investigation, " now in its 7th edition, published by CRC Press.

David Fisher is a Criminalist, Level III in the Department of Forensic Biology at the Office of Chief Medical Examiner in New York City. He is a Diplomate in the American Board of Criminalistics and is a member of the Northeastern Association of Forensic Sciences. David was recently deployed to the Gulf region with the Disaster Mortuary Operation Response Team (DMORT), which is part of the National Disaster Medical System under FEMA to aid in the identification of the victims of Hurricane Katrina. He holds a BS in biochemistry and cell biology from the University of California, San Diego and is currently finishing his MS degree in forensic science at the John Jay College of Criminal Justice at the City University of New York.

Jason Kolowski is a Criminalist, Level III in the mitochondrial DNA laboratory within the Department of Forensic Biology at the Office of Chief Medical Examiner in New York City. He is also a Diplomate in the American Board of Criminalistics, and a member of the American Academy of Forensic Sciences and the Northeastern Association of Forensic Scientists. Jason is a member of the DMORT Region II team under FEMA. Jason attended Cornell College where he earned a dual BA degree in biochemistry/molecular biology and philosophy. Jason earned his master's degree in forensic science in 2003 from the John Jay College of Criminal Justice, at the City University of New York.

John Leeson is a British actor best known for voicing K-9 on the television series "Doctor Who. "He trained at the Royal Academy of Dramatic Art in London and his extensive stage and screen career has spanned nearly half a century.