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Medical Investigation was an American medical drama television series that began September 9, 2004, on NBC. It ran for 20 one-hour episodes before being cancelled in 2005. The series was co-produced by Paramount Network Television and NBC Universal Television Studio The former controls North American distribution rights, while the latter distributes outside North America.

The series featured the cases of an elite team of medical experts of the National Institutes of Health who investigate unusual public-health crises, such as sudden outbreaks of serious and mysterious diseases. In actuality, medical investigative duties in the United States are normally the responsibility of the Centers for Disease Control and Prevention and local health departments, while the NIH is primarily a disease-research and -theory organization.

The series existed in the same television universe as Third Watch and, by extension ER. A special two-part crossover event aired on February 18, 2005, establishing the television-universe connection by featuring the Third Watch and Medical Investigation teams working together in MI's Episode 17: "Half Life" and Third Watch's Episode 16 of the sixth season: "In the Family Way". The story was about a series of Marburg virus cases in New York.

  1. Jason Horwitch


Series Cast

  1. Neal McDonough as Dr Stephen Connor

    Neal McDonough

    Dr Stephen Connor

    20 Episodes

  2. Kelli Williams as Natalie Durant

    Kelli Williams

    Natalie Durant

    20 Episodes

  3. Christopher Gorham as Dr. Miles McCabe

    Christopher Gorham

    Dr. Miles McCabe

    20 Episodes

  4. Anna Belknap as Eva Rossi

    Anna Belknap

    Eva Rossi

    20 Episodes

  5. Troy Winbush as Frank Powell

    Troy Winbush

    Frank Powell

    20 Episodes

  6. Elena Finney as Kim

    Elena Finney


    20 Episodes

  7. Susanna Thompson as

    Susanna Thompson

    3 Episodes

  8. Jeremy Ray Valdez as

    Jeremy Ray Valdez

    2 Episodes

  9. Shea Whigham as

    Shea Whigham

    2 Episodes

  10. View More

Full Cast & Crew

Last Season

Season 1

2004 • 20 Episodes

Season 1 of Medical Investigation premiered on September 9, 2004.

Mission La Roca (2)

(1x20, March 25, 2005) Season Finale

View All Seasons

Medical Investigation


Status Canceled


  • See more TV shows from NBC...

Type Scripted

Original Language English


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