Give My Brother Back to Me!
After seeing the pearl that Largo has retrieved from the rocks facing the sea, Black Jack heads from the backyard through a cave in the rocks to the cove. Seeing the shining pearl in the cove, Black Jack explains to Pinoko that it belonged to a friend he parted ways with 10 years ago, and begins to talk about what happened back then. 10 years ago, Black Jack treated an injured killer whale that washed up in the cove. As a thank you for the treatment, the killer whale brought the pearl to Black Jack in its mouth. Since then, Black Jack has named the killer whale "Triton," which keeps coming back to the cove after getting injured, and they have grown closer...
Aired 24/01/2005EP 12 - Give My Brother Back to Me!
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)