Leonard Stern, the Emmy-winning executive producer and writer of Get Smart who also wrote for such iconic TV series as The Honeymooners, The Phil Silvers Show and The Jackie Gleason Show, died Tuesday. He was 87. Stern also created the word game Mad Libs, which gained popularity after it was featured in bits on The Steve Allen Plymouth Show in the 1950s, when he was a writer there. Among his movie credits, he penned the 1952 film The Jazz Singer, starring Danny Thomas, and Abbott And Costello In The Foreign Legion.