What, some people didn't really like this one? Personally, I actually liked it. Sure, some of it bordered on being completely ridiculous (the train and the shark come to mind), and it kind of was all over the place, but they didn't really seem like glaring problems to me compared to some other episodes this season, and a lot of things actually seemed pretty funny to me. Also, aside from the weird stuff, the delivery of the jokes seemed to be well done. Some of the time they didn't even stoop to the level that they have on some other jokes this season. The slight continuity with season 1 was also interesting to me, even if it wasn't entirely focused on all that much. And the ending was a bit rushed...but I didn't mind.
Another thing, I liked how Santa's Little Helper and Snowball II acted mostly like animals in this one. Also, the first and third acts were decent, but the second act really surprised me. All-around good jokes, great flow, and excellent characterization (well, that part was constantly good...) really brought up the score for me. Duffman's inclusion in the third act was also well done.
Yeah, there were problems in this episode. But I'd say the pros outweigh the cons. 3.5/5, rounded up to a 4.
Did anyone catch what the last entry on Homer's favorite family members was?