Dr. T. Berry Bearzelton is a famous bear doctor who appears in episode 3591 of Sesame Street. He is described by Baby Bear as the nicest doctor in the world, as he makes a house call to the cottage of the Three Bears. His task is to get Baby Bear to kick the habit of sucking his thumb. He demonstrates how to take one's thumb out of your mouth, instead of leaving it in. He gets so caught up in his demonstration that he too becomes a thumb-sucker, leaving Baby Bear uncured.