Blink is one of the most well-liked Doctor Who television stories and for good reason. It's gripping. It's well paced. The directing is excellent. There are multiple genuinely scary moments (not to mention the ending...). The characters are likeable. The plot feels interesting and clever. All of these and more work together to make Blink one of the best Doctor Who stories out there. The only thing holding me back from giving it a full 5 stars is that there are a number of plot holes and unexplained/nonsensical things which, when noticed, do detract from the immersion a little.