Some episodes featured Manitoba Museum curator Dick Sutton presenting segments on nature and its history.
In March 1957, the series featured Manitoba Telephone System executive R. P. Coats who demonstrated principles of telecommunications by presenting basic, easily constructed devices.
University of Manitoba greenhouse operator Stan Westaway taught about plants, trees and vegetables during the May 1957 broadcasts.
Rod Mackenzie, a Winnipeg secondary school teacher, hosted the final three episodes of Discoveries on the topic of electricity.
[1] This series is distinct from an Ann Arbor, Michigan-produced Discoveries science series which was presented by Mary Lela Grimes and broadcast on CBC Television from July to September 1959.