Doctor 13
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Character
The doctor is a doctor who appears in the episode "My Leg!"
Appearance
This doctor is a light purple fish who wears glasses, a white doctor's coat, and a head mirror. He has large teeth and a big mouth.
Role in episode
The doctor appears to remove Fred's cast on his leg and he tells Fred to be more careful with his leg, or else he will have to replace it with a robot's leg. Fred finds this cool, but the doctor tells him that it is not and that the leg with be taken from another robot. He is then seen at the end of the episode, dancing and grinning to Fred's song.