Dubbed a “tweet-peat,” the experiment was a cross between DVD commentary, live chat and pop-up video, where cast and crew from the two shows sat in on each program’s repeat episode and used Twitter to provide context, clues and jokes about the on-screen content, as well as answer questions from fans via the micro-blogging service. … One lesson he learned was to give the viewers the option of being able to turn off the tweet-stream.
When Twitter And TV Collide, Forbes