Trying to stop them are the constantly aggravated head zoo director, Mr. Eustace P. Peevly (voiced by John Stephenson), and his hopelessly inadequate assistant Lionel J. Botch (voiced by Joe E. Ross).
The bears have a modern "bachelor pad"-styled den at the zoo containing actual beds, Bubi's laboratory, a moving chair, a television, refrigerators, and a pizza maker.