Season 6, Episode 11: Fear of Flying
When the Simpsons get on a plane to take a trip, Marge panics at the last minute, putting the family’s vacation on hold and the stress disrupts Marge’s life afterward. To cope with her fear of flying, Marge goes to see a therapist, who is voiced by Anne Bancroft.
During one of their sessions, Marge and her therapist look back at Marge’s childhood to see if her fear might be linked to a traumatic experience. Just one of several childhood experiences Marge recalls is a visit to a cornfield that went horribly wrong.