With unique access to five vaccine teams around the globe, this is the extraordinary inside story of the unprecedented quest to develop and make vaccines to fight Covid-19.

Dr Chris Van Tulleken is joined by his brother Xand and Dr Guddi Singh to take us through the latest developments and answer current concerns.

Gregg Wallace and mathematician Hannah Fry invite five special guests to a unique dinner party where they are scored on the environmental impact of every dish they choose.