Bob has a report due at school, and he needs help fast! Who can tell Bob all he needs to know about the BIG CITY? Joe Hammer, private detective, that's who! Join Bob the Vid Tech (Bob Heck) for his latest adventure as he visits City Hall, the Baltimore Police Department, the Fire Department, the Maryland Historical Society and the Baltimore Museum of Industry. In this wacky action-packed special, he learns all about the City, its history and what keeps it running. There are a million adventures in the BIG CITY...but none quite like this!