The Adventures of Brisco County Jr. - Season 1 Episode 17 -

Brisco and Bowler are seemingly contacted by Professor Coles (from The Orb Scholar), but its actually a ploy by John Bly, who is in cahoots with the professor's daughter. She is suffering from an aging disease and needs the Orb's power to heal herself. She sells out her own father to try and obtain it. Brisco eventually corners Bly and shoots him with a bullet made of orb metal. This traps Bly in the Orb (at least for now) and Brisco turns it over to the government.