Anthony Griffiths is Professor of Botany at the University of British Columbia, Canada.
Burton Guttman is Professor of Biology at The Evergreen State College, Washington. His published work includes Genetics: A Beginner’s Guide.
David Suzuki is Professor Emeritus at the University of British Columbia, Canada.
Tara Cullis taught at Harvard University for five years, and is an expert on science and social issues.
Sackville is a stage, film and television actor, as well as a voice artist. He graduated from the Webber Douglas Academy of Dramatic Art and went on to play leading and supporting roles in regional theatre, the West End, the National Theatre and with the Royal Shakespeare Company. Sackville has appeared on film and television in The Crown, Call the Midwife, Genius, The Secret of Crickley Hall, Midsomer Murders and Rosemary & Thyme. His more recent projects include Sky Atlantic's Lockerbie, ITV/Disney + Suspect and Truth & Conviction for Angel Films. Film includes The Wedding Date and The Lost City of Z. He has narrated over 150 audio books. Sackville also lends his voice to documentaries and computer games.