Compared to the first Star Trek feature film—a first effort that almost felt like watching grass grow—The Wrath of Khan delivers a real Star Trek experience in movie format. Traces of some of the original's flaws remain, but they are appropriately contained in sequences that make heavy (re)use of footage from the first, very sedately paced film.

It was probably inevitable that this second film would make a bigger splash. After all, its very title invokes one of the Trek fandom's favorite villains, and promises to bring him back. And back he comes, Ricardo Montalban performing splendidly—perhaps even better than he did in the TV series episode that introduced Khan.

There's also just more meat to this plot than the first film. It has character development, it establishes additional backstory, and even introduces a new technology (the "defense field") never seen again in a Trek production. Joking aside, Kirk and Spock get to explore real emotion, and we see just how far Spock will go for logic. (Stopping just short of a spoiler here so I don't have to flag this.)

Keep an eye out for an egregiously bad cut near the end—it's notable because it's the only truly bad edit in the film (that I've noticed). I'll say only to keep an eye on Kirk when he's in Engineering—anything more would be a spoiler.