Doctor Who has changed a lot since it first began in 1963, and one of the easiest ways to spot this change comes right in the opening lines for the First Doctor and the Ninth. Doctor Who has had an incredible legacy stretching over more than 60 years. In that time, the show has grown from a small British serial drama about time and space travel, to the longest running sci-fi show on TV. However, just because its roots go back to the 1960s, it hasn’t stopped the show from evolving over time.