Chuck Cunningham Syndrome / Radio

  • Adventures in Odyssey: After the fairly recent "Best Small Town" Story Arc closed, the series went on a hiatus and, when it came back, nearly all of the current characters except for Whit, Connie, Eugene, and Wooten had suddenly disappeared, including major characters such as Tom Riley, Bernard Walton, the Washingtonsnote  and the Rathbones. And, considering that the VOs for Tom Riley, Bart Rathbone, and Bernard, Walker Edmiston and Dave Madden respectively, have since passed away, the chances of those characters in particular returning seem rather slim.
  • In The Men from the Ministry's first series, the General Assistance Department had a second secretary named April Adams. For whatever reason she disappeared without a word afterwards, and was even completely Adapted Out in the 1980 re-recordings and the Finnish version.
http://tvtropes.org/pmwiki/pmwiki.php/ChuckCunninghamSyndrome/Radio