Professor Peabody was the mother of Lukran Peabody.
The interbreeding of humans caused birth defects and many other problems. When Professor Peabody came up with apure[statement unclear] human DNA she gave it to her son to be the first in a new line. However the Pyxians also wanted the DNA. To protect Lukran Professor Peabody hired K9. The Pyxian kidnapped Lukran but were stopped by K9 who brought Lukran back to his mother. (PROSE: Stranger On The Train)