The medico in question is famed gunslinger Doc Holliday, played by Stacy Keach in this thoughtful retelling of the showdown at the O.K. Corral that uses the gunfight as background as it examines Holliday the man. With Faye Dunaway, Denver John Collins, and Harris Yulin as Wyatt Earp. 96 min. Widescreen; Soundtrack: English Dolby Digital mono.