There’s been a series of mysterious deaths out in the desert. When little Sandy Descher is found wandering catatonic and clutching her doll all she can do when they put formic acid under her nose is scream, Them! And run in terror. Radioactivity has caused a mutation in the ant population and now they’re gigantic and killing people! This was the best giant bug movie and it’s pretty great, with James Whitmore as the brave cop on their trail, James Arness as an FBI agent and Edmund Gwenn as the venerable scientist tracing the effects of atomic explosions and his clever daughter, fellow scientist Joan Weldon coming face to face with the unleashed beasts. Time is running out and they need to get the army to help them kill the queens in their nest … which necessitates a chase through the storm drains of Los Angeles. Brilliant sci fi from a story by George Worthing Yates (who would write a lot more in the Fifties), developed into a screenplay by Ted Sherdeman and Russell Hughes and directed by Gordon Douglas. There are good effects and a fantastically exciting score by Bronislau Kaper, adding enormously to the thrills.