I first heard Orson Welles' WAR OF THE WORLDS when I was in elementary school. Even then, I couldn't understand why people thought that the Martian invasion was real.
I watched this PBS AMERICAN EXPERIENCE documentary on Tuesday, October 29, 2013, on Washington, D.C. affiliate WETA - the eve of the 75th Anniversary of the original broadcast on the Columbia Broadcasting System (not "Service," as the documentary claims). I received the DVD on November 1, 2013.
The documentary is a fine behind-the-scenes look at the documentary and the panic it caused. There are interviews with Welles' daughter, Chris Welles Feder, director Peter Bogdanovich, and several others, along with recreations, played by actors, of reactions of people who heard the broadcast.
Not much in the way of extras, except for a few outtakes, a brief "making-of" segment, and some of the letters written to Welles.
A good documentary, though I think 2 hours would have given it justice.