A double feature of B-movie greats by director Ray Kellogg. Both feature outsized animals and the heros who try desperately to defeat them. The horror! THE GIANT GILA MONSTER: When a Texas town is threatened by a gigantic lizard, a singing and swinging teenager kick starts his friends into gear to stop the crazed beast. An enjoyable romp through 1950s science fiction drive-in cheese, the sleepy lizard wreaking havoc on miniature sets is no less terrifying than the musical numbers. THE KILLER SHREWS: People trapped on an island off Texas are attacked by vicious shrews developed by bungling scientists. If they had substituted dinosaurs for the tiny rodents, this might have been "Jurassic Park."