Wow, this was a very strange episode, the most unusual one I've seen in the Batman animated series. It is a real thinking person's episode where things aren't what they seem. The villain does not appear until the last few minutes and he's behind all the strange events that Batman experiences throughout this story.
The beginning of this episode features a spectacular car chase scene that is magnificently drawn. Batman, it turns out, is lured into this warehouse, a victim of a trap....and then wakes up in his bed....and is in a world he totally is unable to understand. Is it real, or is it a dream....it's hard to tell.
There is a ton of sci-fi here, an intelligent show that will keep you puzzled, as Batman was here. When we find out what this is all about, near the end, it's pretty neat. Until then, be ready to be confused.