The series depicted three fun-loving bears - the fast-talking Hair Bear (voiced by Daws Butler), bafflegab-talking Bubi Bear (voiced by Paul Winchell), and laid-back Square Bear (voiced by William Callaway) — who are always trying to find a way to escape from the Wonderland Zoo on some sort of get-rich-quick scheme, or a wild night of fun. 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). Mr. Peevly and Botch work for the Zoo Superintendent (also voiced by John Stephenson), and both of them try to stay on his good side. Many episodes end with Hair Bear covering for Peevly, couching the shenanigans and disarray as a project initiated by Peevly for the zoo's welfare, which the Superintendent always accepts (and he spares Peevly's job). 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. Yet they disguise it (with secret panels) from Peevly and Botch to avoid revealing their comfortable surroundings. While the bears escape the zoo for larks and excursions, they cherish the easy life in the zoo and do not wish to leave permanently; Peevly, aware of this, often threatens to expel the bears from the zoo and into the North Woods - a prospect the bears dread, because they would lose their domestic lifestyle. The bears also have an invisible motorcycle, which Square Bear can call upon when necessary by jumping in the air and kicking his leg to start it. The motorcycle is never explained, though in episode twelve, Hair Bear comments: "I don't know what he does, but I'm sure glad he does it".