Headscratchers / Danger Mouse

• In the episode "Chicken Run", how was Danger Mouse able to get Penfold back to normal size? They didn't show it in the episode.
  • Obviously the serum wore off in the rain, as the Professor said it would.
• How could humans on Baker Street never notice that there's a small Lambourghini style car coming out of the bottom of a pillar box?
• What is the deal with DM's eye-patch in the reboot? He obviously has a glass eye in one episode, but his eyepatch functions as infrared goggles. How can he see anything out of that eye?