Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Glitchy disks had to return

I eagerly purchased both this set of the discs along with season 4. I was able to watch the first episode without a problem. The next episode was so glitchy with pixelation and pausing constantly and freezing that it was quite literally un-watchable. The third episode started the same way, with glitches - so I turned it off and returned both DVD sets back to Amazon since season 4 would be useless without seasons 1-3. I have found in the past that usually if a series is glitchy and you get a second one to replace it right away, the next set is usually also glitchy. I think it has to do with the fact that so many discs are produced at one time that they would all be defective from that production run.