Codename: Kids Next Door
Dr. Lincoln (voiced by Kevin Michael Richardson impersonating Bill Cosby) - Numbuh 5's father who is inspired by Cliff Huxtable from The Cosby Show due to the fact that they both work as doctors. He used to work as a clown, until his co-worker messed up his joke, ruining their careers. Unlike the other parents, Dr. Lincoln's face is never shown (expect in clown makeup).