Doctor Who’s First Incarnation

From the pilot episode. Source: (IMDb).
On Saturday, November 23, 1963, the first episode of Doctor Who aired on BBC One. It was designed as a family show, to be aired from 5 to 6 p.m., sandwiched between more adult shows and teenage-focused shows. The original episodes were serialized, meaning that groups of episodes were centered on a single storyline. Partially inspired by Sherlock Holmes, it was originally intended as an educational program; many of the first episodes were historical stories, and two of the early main characters were science and history teachers. Over time, tastes changed, and the histories were phased out near the end of the ‘60s since the alien settings were becoming more popular.