Hong Kong Phooey (Scatman Crothers, ex-Harlem Globetrotters) has two cases to solve in this episode. First, it's a safe-snatching robot and his safecracker master, and then, the "Cotton Pickin' Pocket Picker". The sparse backgrounds in the open and some scenes were what passed for normal at Hanna-Barbera at the time, at least for their comedy cartoons.
Edit: 7/12/14: The video has been deleted due to copyright issues.
With HKP marking his 40th anniversary next year, I wouldn't count on the dunderheads at WB or Cartoon Network doing anything to mark the occasion. After all, the series is on DVD, and that seems to disqualify it from ever airing on Boomerang again.