Stellar Portal (TNG): A young exo-archaeologist comes aboard the ENT., to prove his theory about the Iconian Gateways. (His theory is that much of earth's myths are based on alien interaction with primative man. Despite absolute proof in aliens, and that aliens HAD been on Earth, the crew dismisses this theory)
Upon finding a correct "Portal Address", they crew finds themselves in a region of space where the Neural Parasites (Conspiracy) rule humans as gods, and Augmented humans serve as incubators and footsoldiers. The crew decides that some other group should handle this problem, hits the RESET button and orders Data to forget it ever happened.
Always with the problems: (DS9): There is a problem on Bajor; it's basicly a 20th century problem that we (the viewers) can't solve, but with spacey or mystical sounding names. In the end, nothing is sloved, but Sisko makes a nice speech that is very moving, but points out how unsolvable the problem is.
Yup, It's Sweeps Week: (VOY): A pandimentional anomaly (is there any other kind) replaces the regular VOY with a MU duplicates. The plot is basicly them trying to get away from an Alliance cruiser, and they eventually switch back with the real VOY. But the whole ep is an excuse to show off bare chests of most of the men, put the women (even Janeway....

in really revealing outfits, and Seven is naked, but you never see her below the neck, but they tease you). Naomi Wildman is for some reason a teen-age pop star that's only there to get a younger demographic. Neelix is gone, replaced by a Borgafied Gorn trained by Klingons to fight Jem'hadar!
The ending we gave you was crap, but here's the ending my 6 year old son wanted you to see: (ENT) Fighting the Romulans, the ENT. is begining to lose it's warp core. Just before it explodes, Porthos reveals himself to be a magical shape shifting alien from the future (ARcher is actually allergic to dogs, has never owned a dog, but now he loves them), sent to make sure Archer fulfills his destiny. Porthos uses his powers to fix the ship, then he changes the timeline so no one remembers anything about Romulans, and makes the prediction that the war is coming, as is he who must not be named.
When archer and crew ask why he didn't help them before, all he says is "What do you want? I'm a dog!". Then he makes them forget, but Tripp dies anyway, and Archer gives a speech that we don't get to hear, but it's the most enlightening and heartwarming speech ever given. Instead of hearing that, we get to watch Porthos eat a chunk of cheese.