I remember growing up and watching TV with my grandfather, he use to watch the show Stargate back when it was still in the making.

Okay, so initially it was up in the air as to whether or not Capaldi would make a good Doctor, well after watching episode six, I've got my answer. This episode was amazing!

This here is my rant as to "Why Aliens Haven't Visited Us". There are a variety of other possible reasons and views that may apply but I think together they provide weight in the matter.