"Info-dumps" are a hazard of sci-fi and horror storytelling. They're those parts of the story where a character stops to tell another character what's going on because, presumably, the audience hasn't caught on yet because, presumably, it's all to weird for us to decipher.
The problem is, if the authors have done their job well, the audience can already see what's happening, so the info-dump is redundant and brings the story to a halt for no reason.
Yes, this episode has several info-dumps, but most of them are short and, mostly, no one has to break character to deliver them. Since sci-fi fans have learned to tolerate these things, this doesn't really hurt the show until the end, when one of the characters actually points the camera at himself so he can explain the theme of the show to the audience. Ugh.
But, up until then, this episode was pretty effective. The characters are investigating the abandonment of another spacecraft. There's a mystery to be solved, and it's a pretty creepy one, with cryptic messages and several things jumping out of nowhere and then disappearing into the darkness of the crippled ship.
One of characters is documenting the investigation with a video-camera, so the audience literally sees the story through the eyes of someone who is involved in the situation, and learns about the mystery along with that character, in "real time," and is right there with the character as his comrades succumb to the madness that created the mystery.
It's too bad the filmmakers didn't trust that they had shown the audience everything they needed to understand the show, because the final info-dump crippled everything that went before it.