Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Love the show, but this one STUNK

I'm a huge Always Sunny fan and enjoy pretty much every episode, but this one was by far the worst one I've ever seen. It's told in flashback form, about Frank and his brother in the 60's and 70's. There isn't really one funny moment except for clips of Frank indulging in a substance he helps his brother sell. This season has been good so far, but this episode can be flushed down the drain.