Conversation so far:
How did Lisa Simpson's development start?
Lisa Simpson demonstrates her intellect in the 1990 episode Krusty Gets Busted, by helping Bart reveal Sideshow Bob's plot to frame Krusty the Clown for armed robbery.
How was Lisa Simpson like Bart Simpson?
In The Tracey Ullman Show shorts, Lisa Simpson was something of a female Bart: equally mischievous but lacking unique traits.

Question: What were some of the episodes when she was in deveopment?
Self-contained rewrite: What were some of the episodes when Lisa Simpson was in deveopment?