Nyaloka Auma

饰：Self

Albert-László Barabási

饰：(as Prof Albert-László Barabási)

Lori Benson

饰：Self

Richard Boskey

饰：Self

Iain Cruckshank

饰：(as Cadet Iain Cruckshank)

Frederick Moxley

饰：(as Dr Frederick Moxley)

Margaret Owino

饰：Self

Steve Strogatz

饰：(as Prof Steve Strogatz)

Phillipp Thomas

饰：Self

凯文·贝肯

Kevin Bacon

饰：Himself

琳达·克罗珀

Linda Cropper

饰：Self - Narrator

Robert Lee

Robert Lee

饰：Narrator

Alessandro Vespignani

饰：(as Prof Alessandro Vespignani)

Kenji Maeji

Kenji Maeji

饰：Self