When the police captain comes for inspection, not only is the alley clean, but Top Cat also offers such good suggestions for improving the police force that he is made honorary sergeant.
After overhearing Officer Dibble suggesting ways to improve conditions for the police force, Top Cat passes off Dibble's ideas to the Captain as T.C.'s own. This leads to Top Cat's being made an honorary police sergeant --and Dibble's boss in the alley.—afsnowbird