This is the most entertaining radio series I know. Listen here
Wikipedia: “Created by Goodman Ace for CBS Radio, it blended history with modern technology, taking an entire network newsroom on a figurative time warp each week reporting the great events of the past. Reporters included John Charles Daly, Don Hollenbeck and Richard C. Hottelet. The series was first heard on July 7, 1947 under the title CBS Is There. Its final broadcast was on March 19, 1950 under the title You Are There.
According to author/historian Martin Grams, actor Canada Lee was a guest in episodes 32 and 60. Martin Gabel appeared in character in episode 82. The first 23 broadcasts went under the title CBS Is There and beginning with episode 24, the title changed to You Are There. A total of 90 episodes were broadcast. Only 75 episodes are known to exist in recorded form“