I know you probably don't want to know either, but...
The Third Doctor was trapped on Earth for years as a punishment from the Time Lords. He wound up working for the UK branch of UNIT, the United Nations Intelligence Taskforce, an essentially military outfit that investigated weird stuff, mainly alien invasions.
In one story (OK, two), the Doctor and UNIT encounter the Silurians. The Silurians evolved on Earth many years ago but then went into hibernation. When a few awoke in the 20th century, they discovered their planet was over-run by us apes. [Cue variation on standard alien-invasion plot.] The Doctor intended to broker a peaceful agreement between Earth's two indigenous species, but UNIT commander Brigadier Lethbridge-Stuart blew up the hibernating Silurians. Doctor horrified but unable to stop it.
Despite this, the Doctor keeps working with UNIT and maintains his prickly friendship with the Brig, even after the Doctor manages to leave Earth. The Brig has worked with more incarnations of the Doctor than possibly any other human, including the Second, the Third, the Fourth, the Fifth and the Seventh. Sarah-Jane, who also knew him well, sends him best wishes in The Sarah-Jane Adeventures, so it's not impossible for him to meet a new incarnation even now.
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Spoilers
Date: 2008-01-27 12:41 am (UTC)The Third Doctor was trapped on Earth for years as a punishment from the Time Lords. He wound up working for the UK branch of UNIT, the United Nations Intelligence Taskforce, an essentially military outfit that investigated weird stuff, mainly alien invasions.
In one story (OK, two), the Doctor and UNIT encounter the Silurians. The Silurians evolved on Earth many years ago but then went into hibernation. When a few awoke in the 20th century, they discovered their planet was over-run by us apes. [Cue variation on standard alien-invasion plot.] The Doctor intended to broker a peaceful agreement between Earth's two indigenous species, but UNIT commander Brigadier Lethbridge-Stuart blew up the hibernating Silurians. Doctor horrified but unable to stop it.
Despite this, the Doctor keeps working with UNIT and maintains his prickly friendship with the Brig, even after the Doctor manages to leave Earth. The Brig has worked with more incarnations of the Doctor than possibly any other human, including the Second, the Third, the Fourth, the Fifth and the Seventh. Sarah-Jane, who also knew him well, sends him best wishes in The Sarah-Jane Adeventures, so it's not impossible for him to meet a new incarnation even now.