Since this question is (so I've been told in comments) not asking this question, I'll ask it.
When was the first broadcast of a Doctor Who episode in which an alien species other than Time Lords visit Earth, and which alien species was it?
Science Fiction & Fantasy Stack Exchange is a question and answer site for science fiction and fantasy enthusiasts. It only takes a minute to sign up.Sign up to join this community
The Dalek Invasion of Earth was first broadcast 21 November 1964. The first episode of the serial was World's End, and is the first to feature aliens other than the Doctor and Susan on Earth.
First Doctor serials, in broadcast order:
Interestingly, the Daleks weren't the only additional aliens on Earth in the invasion. The black Dalek had a cute little pet called a Slyther.
Here's the first episode of the serial:
I think it was Daleks, on 1964/11/21 in The Dalek Invasion of Earth