This episode had me gripping my chair.
It starts out as your basic "Protocol" argument between Archer and T'Pol, Archer decides to ignore T'Pol's suggestions and beams down an "Away Team" to check out what looks like a fabulous Planet.
But great weather turns into a storm, and then things start happening, trapping the Away team on the surface. And then the fun really starts, until the paranoia sets in, affecting even T'Pol.
I had never seen this episode until it came up in my Player. In a way, the "Protocol" argument is something I can imagine happening. Larry Niven explains Space Exploration thus: "Anything you don't understand, is Dangerous until you DO understand it" and that certainly applies here, this planet could have endured a bit more scrutiny before people were shuttled down to it. And then leaving people on the surface overnight was rather stupid, this wasn't a National park with a Ranger station nearby.
There were moments in this episode that were enjoyably startling, and Braga's concept of turning an Away Mission into your basic Nightmare, I'd say it was successful.