X Minus One - Dwellers in Silence (#24) 

11/10/55, episode 24
This episode provided by the Old Time Radio Researchers Group
www.otrr.org
The Earth has been annihilated by radioactive wars. A spaceship from Mars discovers the famous scientist Cornelius Hathaway, almost 80 years old, has survived the blasts. What is curious is that his wife and children have also survived, but they have not aged. The children still look like they are in their teens and 20s. And Hathaway's wife is a beautiful woman. What could be happening? All is explained at the end in this excellent Ray Bradbury story. (from "The Critical X Minus One" by Jim Fanisher)
Credits (Goldin): Ray Bradbury (author), Anne Seymour, Karl Weber, Ted Osborne, Richard Hamilton, Edwin Jerome, Stan Early, George Lefferts (adaptor), William Welch (producer), Daniel Sutter (director), Fred Collins (announcer)