The first host was
Donald Ivey, with
Patterson Hume co-hosting many episodes. Following Ivey's departure, the second season continued with several guest hosts, including
Lister Sinclair,
Donald Crowdis, and
John Livingston.
David Suzuki became the show's host and narrator in 1979, He was succeeded by co-hosts Sarika Cullis-Suzuki (David's daughter) and Anthony Morgan. The series has won many awards and Suzuki has won three
Gemini Awards and one
ACTRA Award as best host. Documentarian
William Whitehead has also been a frequent writer for the series. In 1979 the show was merged with David Suzuki's
Science Magazine series and expanded to an hour. There is one new episode every week which all contribute to a scientific understanding of how the world works. They are created not only for entertainment, but also to encourage and popularize education. An episode in January 2018 was widely criticized by scientists and Native Americans for its uncritical presentation of the
Solutrean hypothesis. In 2023, Suzuki announced his retirement and was succeeded as host by his daughter, Sarika Cullis-Suzuki, and Anthony Morgan in 2024. ==Notable episodes==