Detective Comics (1937-) #121

“COMMISSIONER GORDON WALKS A BEAT!” Batman and Robin are summoned to the GCPD headquarters where they learn that Commissioner Gordon has been replaced by orders of the mayor. Gordon has been demoted to a beat cop and Batman's deputy status is also revoked without explanation! Plus, Slam Bradley in “THE CASE WITHOUT A KEY!” And Air Wave is hot on the trail of gangster Dink Dillman in “HAPPY JAIL-DAY TO YOU!”