So anyway, my idea is that you are acting as an emissary, or ambassador of the Allornians - and it it the first time your race has visited Earth, in that time period because your race has not mastered time travel.
You land a spaceship just as the to be named TARDIS crash-lands on Earth. Al'Klin is greeted with horror and threat as they think he is there to enslave or kill the human race.
They are scared at first and shy away until human domination instincts kick in and they try to kill you. The Doctor and Al'Klin are caught up in all this mess, and thus a serial is born.
Thoughts?