 " Rosebud " was written by John Swartzwelder and was the first episode to be executive produced and run by David Mirkin . Mirkin enjoyed working on the episode so much that he spent " an enormous amount of time on post production " experimenting with various elements of the episode . Originally , the backstory for Bobo included several much darker scenes , including one where the bear was involved in the assassination of John F. Kennedy . The scenes were cut because the writers felt it was in bad taste . The ending of the episode was originally longer , but two segments were cut . The first saw Washington D.C. destroyed by invading Canadian troops , who found Bobo . The second featured the entire planet being overrun by giant Redwoods and spotted owls . 
