This is a real high point for both the season and the series. Edlund (writer) is one of the most distinctive voices on the show and he has written such classics as "Nightshifter" and "Ghostfacers." This episode has all his trade marks-the weird details like the the volleyball co-captains or the nice blend of horror and comedy. The Golem and Aaron are a wonderful comedic duo and yet they don't undermine the show's stakes. The Thule end up being a great secondary villains in the later seasons. This is such a solid script as always.
The episode also is wonderfully directed by Sgriccia-the director of such classic episodes as "Yellow Fever" and "Good God, Y'all." He has a great eye for details-like the ugly electric cord on the fridge or the flashlights as the only light source when the bros first go into the Bunker. The scope of the story is quite large for a single episode and Sgriccia does that quite well. And he got the right two actors for the Golem and Aaron.
This combination of writer and director is often the show at its best. The later seasons lose something once this combination was no longer possible once Edlund left.