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The Broca Divide

01.05 Episode 5 (#3956)
Airdate: August 15, 1997

When SG-1 visits P3X-797, they discover a world with a unique rotation that results in a light side and a dark side. In the Land of Light live the Untouched, a people descended from ancient Minoans, but on the dark side are the Touched, violent primitives resembling early man. When members of the SGC, including O'Neill, Carter, and even Hammond, begin a startling transformation to the same primitive appearance and behavior, Daniel and Teal'c return to the planet to find a cure for the planet's virus that is threatening to spread to Earth.

Written by: Jonathan Glassner
Directed by: William Gereghty

Guest Starring: Teryl Rothery as Dr. Fraiser, Gary Jones as Technician, Steve Makaj as Makepeace, Nicole Oliver as Leedora, Gerard Plunkett as High Councillor Tuplo, Danny Wattley as Lieutenant Johnson, Roxana Phillip as Melosha

Reference: Janet Fraiser, Histaminolytic Virus, Lieutenant Johnson, Land of Light, Leedora, Colonel Makepeace, MALP, Melosha, Security Lockdown, Touched, Tranquilizer, Tuplo, Untouched


Destinations & Inhabitants

Land of Light

Destinations & Inhabitants



  • The mission to P3X-797 included a joint team of SG-1 and SG-3 Marines.
  • Heelksha are evil gods of the underworld.
  • The Touched are pre-Stone Age, the Untouched are Bronze Age.
  • Pierre Paul Broca was a 19th century anthropologist who founded modern craniometry and studied the divide in intelligence in early species of mankind.
  • The new Presidential Directive is to evaluate the scientific and cultural value of each mission.
  • Stargate Command at Cheyenne Mountain used to be a missile silo.
  • A Code Five Lockdown mandates that the mountain be sealed and anyone attempting to leave will be shot.
  • Contagious parasitic histaminolytic virus feeds on neuro-transmitters and releases hormones, resulting in physical and behavioral changes resembling primitive man.
  • The cure for the virus is mega doses of Chlorpheniramine Maleate.
  • Final symbols for Apophis's homeworld were identified by the refugees from Chulak: 38-10-32
  • P3X-797 coordinates: 26-2-?-38-10-32
  • Chulak point of origin: 7


  • Thank you, Sir. I pride myself on my deductive reasoning skills. [O'Neill]
  • You watch our lovely backsides, remember? [O'Neill]
  • She tried to seduce me. [O'Neill]
    Oh... You poor man. [Daniel]
  • Lucy, I'm home! [O'Neill]
    I am not Lucy. [Teal'c]
    I know that... [O'Neill]
  • Daniel, you dog. You keep this up, you'll have a girl on every planet. [O'Neill]
  • If it doesn't heal properly, you'll never wear that sweet little tank top number again. [O'Neill]


  • For crying out loud: 4
  • Kids: 1
  • O'Neill calls Carter "Samantha": 1
  • Teal'c saved by his symbiote: immune to the disease
  • Injuries:
    • Carter: contracted disease, small stab wound to the stomach
    • Daniel: contracted disease, cuts and bruises
    • O'Neill: contracted disease, cuts and bruises
    • Hammond: contracted disease
  • Popular Culture References:
    • I Love Lucy
      • Lucy, I'm home!