This is a warning, not a recommendation. Though the subject of this documentary – Orson Welles’ iconic 1938 radio adaptation of H.G. Wells’ War of the Worlds – is more than worthy of study and celebration, it’s already been treated very well by previous efforts, both nonfiction and dramatized. What does this new entry bring to the party? Nothing, except for lame fake black-and-white “interviews” with “witnesses,” in which actors (one is pictured here) quote lines from letters written at the time by those who experienced the original radio broadcast. These segments are tacky, and unconvincing, and entirely unnecessary and uninformative, making this entire Halloween special much more trick than treat. The original Welles broadcast? Always worth experiencing. This 75^th-anniversary tribute? Not even close. Check local listings.