The British science fiction television series Doctor Who was first broadcast on BBC One. It introduced the concept of the Doctor, a Time Lord who travels through time and space in the TARDIS.
The Daleks, one of the Doctor's most iconic and enduring foes, appeared for the first time in the serial "The Daleks," establishing a key element of the series' legacy.
William Hartnell, the First Doctor, regenerated into Patrick Troughton as the Second Doctor, introducing the concept of regeneration which allowed the series to continue with different actors.
The original run of Doctor Who was cancelled by the BBC after 26 seasons, ending the classic era of the show initially.
A television movie was produced as an attempt to revive Doctor Who, featuring Paul McGann as the Eighth Doctor, aiming to reintroduce the series to a new audience.
Doctor Who was successfully revived as a new series on BBC One, starring Christopher Eccleston as the Ninth Doctor, leading to a renewed and ongoing popularity.
The Doctor Who 50th anniversary special episode "The Day of the Doctor" was broadcast simultaneously in 94 countries worldwide, celebrating the series' legacy.
Jodie Whittaker was introduced as the Thirteenth Doctor, marking the first time the Doctor was portrayed as a woman in the main television series.
The Great Vampires appear in the universe and are defeated by the Time Lords, marking the establishment of the Time Lords' authority over time travel.
The civilization on Gallifrey evolves with the discovery of time travel, and the Time Lords establish themselves as a powerful race overseeing time.
The Time Lords and the Daleks engage in a devastating war across time and space, culminating in the near destruction of both races. The Doctor seemingly ends the war by destroying Gallifrey to save the universe.
The Doctor begins his travels through time and space, traveling with companions and fighting various threats.
The Tenth Doctor is mortally wounded but uses the Time Lords' stationary technology to regenerate into the Eleventh Doctor, just in time to save his friends.
An alliance of the Doctor's greatest enemies trap him inside the Pandorica, believing him to be the cause of the universe's destruction, leading to a temporal paradox resolved by the Doctor.
The Silence manipulate Earth's history from behind the scenes, attempting to prevent the Doctor's interference and control the outcome of future events.
The Cybermen launch their initial campaign against Earth, posing one of the Doctor's greatest long-term threats.
