My Tholian brothers/sisters! We are introduced to the universe of Star Trek! Not only is this a 'good' Season 3 episode, it introduces Star Trek to aliens that aren't humanoid! And we're awesome! We've got awesome ships, awesome technology and killer voices. It wasn't until Species 8472 was introduced in Voyager before Star Trek got another alien species that wasn't just a human with a piece of prosthetic somewhere on the head.
*clears throat*
Sorry. Love the Tholians. They're my favorite.
In regards to the behind the scenes article,
"The costumes were skin-tight with no zippers; they would have shown. They had no buttons or snaps. The guys were SEWN into the space-suits."
In the words of SFDebris, god forbid the future have anything as practical as a zipper.
*clears throat*
Sorry. Love the Tholians. They're my favorite.

In regards to the behind the scenes article,
"The costumes were skin-tight with no zippers; they would have shown. They had no buttons or snaps. The guys were SEWN into the space-suits."
In the words of SFDebris, god forbid the future have anything as practical as a zipper.