Orion once harbored a highly advanced civilization whose history had drawn great interest from Federation historians and archaeologists alike. During the mid-23rd century, noted Federation archaeologist Doctor Roger Korby translated medical records from the Orion ruins that helped revolutionize modern immunization techniques and were required reading at Starfleet Academy. In 2269, through the assistance of the Guardian of Forever, Starfleet officers Captain James Kirk, Commander Spock and historian Lieutenant Erickson traveled to the dawn of Orion's civilization to view the planet's history unfold firsthand. (TOS: "What Are Little Girls Made Of?" ; TAS: "Yesteryear")