Them! was the first giant insect movie, and its success spawned a raft of (sometimes superior) imitators, but you owe it to yourself (and your children, if you have any) to see this cheesy bit of cinematic history. I can remember watching this on Saturday afternoon, frozen to my chair but unable to walk away, being sobered and thrilled by Edmund Gwenn's last line on the unknown effects of our dropping the atomic bomb.
The cast is surprisingly memorable: James Whitmore, James Arness, Edmund Gwenn, Fess Parker. Unfortunately the cast listing is short, so the many other familiar character actors who appeared are not recognized, and it's a shortcoming of the otherwise fun extras that they don't fill in this gap. Heck, Leonard Nimoy has a small part, though it's not referenced anywhere on the disc! Action is sporadic and the ants are a bit ... okay, a lot ... laughable.
Extras also include "Bugged at the Movies", text pages about the many giant bug movies that followed; a 3-minute dose of film clips called "Behind the Scnes" but mainly just clips of clapboards; 25 stills, including posters.
Better action, better effects (Harryhausen) and a less leaden leading lady can be found in The Black Scorpion, but this first venture into giant bugdom should hold a special place in any movie-lover's heart!