An Enterprise security lieutenant who beamed down to Eminiar VII with Kirk in 2267 and was held with the rest of the landing party when the ship was declared a war casualty.
Lieutenant Osborne appears in the episode A Taste of Armageddon. He and Galloway are the two security men in the party that accompanies Kirk, Spock and Yeoman Tamura to the council chamber of the Eminiar Union.
Once Anan 7 announces that the Enterprise has been destroyed in a computer attack and that all aboard must die, the landing party is confined under guard as hostages. Spock uses a mental suggestion on the sentry to get them out.
Osborne then takes part in the escape through the corridors, during which the party captures Eminian weapons and uniforms and wrecks one of the disintegration stations before Kirk confronts the council. He has no dialogue of note. He was played by Frank da Vinci.