The Chief is a tough but good-natured flea who runs T.U.F.F. headquarters. In "Internal Affairs", it's revealed that his
real name is Herbert Dumbrowski, he has a bionic foot, has short term memory loss, and is extremely strong for somebody so small. The Chief was once T.U.F.F.'s top agent and an amazing fighter. In one episode, he comes out of retirement to help Dudley deal with the Chameleon. While things don't work out well at first, Dudley manages to give him a pep talk and he shows he's still got it by beating up the Chameleon.