SFDebris is one of the online reviewers whose work I enjoy on a regular basis. His obvious focus is SciFi TV series - he started with reviewing Star Trek TNG episodes and since has added the classic series, Deep Space Nine, Voyager and Enterprise to his repertoire. Followed by non-Trek Series like Babylon 5, Red Dwarf or Doctor Who.
Now, he usually does episode reviews, but I picked this video he just released, because it gives a really nice basic oversight about the history of Doctor Who, a show that over the years I grew really fond of and that, let's be frank, does need some explanation...