A Teacher and a Pupil
When the director of Manaka Hospital dies, an election is held between two doctors who have been recommended for the position of new director. Dr. Shiitake has the same 20 years of service as the other two candidates, but because he is a low-key person who is treated like an assistant, no one recommended him. Meanwhile, a collapse occurs at a construction site in the city. Black Jack happens to be nearby, and Shiitake, who is on his way home, provides first aid to the injured at the scene. Black Jack is surprised to learn that Shiitake, who has advanced medical skills, is just a regular member of the medical staff at Manaka Hospital.
Aired 15/11/2004EP 6 - A Teacher and a Pupil

Black Jack (TV)
Black Jack is an "unregistered" doctor with a clouded, mysterious past. He works with his little assistant Pinoko (who has a massive crush on the doctor), dealing with medical cases not very well known, which can be strange, dangerous, or not known at all. But he is a genius, and can save almost any of his patients' life (as long as they have the money for it, that is), and is known to many around the world, especially to those of medicine and science. He's a man of science himself, and does not believe much until he has seen it, yet it is many times he is surprised by love and nature often overpowering the science he bases his life in.
(Source: Anime News Network)