- Fair for Its Day: For the most part, in its depiction of the younger Dr. Medford, the film was positively enlightened. She's a competent professional who ably assists in dealing with the film's giant mutant ants, including going down with the male (non-scientist) heroes into a gassed colony to make sure the inhabitants are all dead. She does scream once, when she abruptly and unexpectedly comes face to face with one of the creatures, but beyond that moment she also never falls into the Distressed Damsel category.
- One-Scene Wonder: Fess Parker as the pilot-witness; landed him his role as Davey Crockett.
- Retroactive Recognition: A young Leonard Nimoy has an uncredited part as a U.S. Army Staff Sergeant in the communications room
- Special Effects Failure: Compared to today's slick CGI, the ants look dated, but the giant models were impressive for their time, albeit slow-moving. One reason most of the following giant-thing movies were so bad is that pretty much all of them used clumsy super-imposed images to serve as the monster.
- Tear Jerker: When the little girl goes hysterical, you can't help but realize the poor kid is probably remembering her family being slaughtered right in front of her. Heartbreaking.
YMMV / Them!