Daniel Fraser as Zak

Eleanor Wyld as Marie

Owen Pugh as Theo

David Broughton-Davies as Strauss

Emma Powell as Miss Anderson

David Barnaby as Mr. Fortune

Dylan Llewellyn as Zak (Teen)

Georgina Minter-Brown as Marie (Teen)

Timothy Block as Bridges

Ria Carroll as Nicola Tesla

Tom England as Theo (Teen)

Joanna Hole as Headmistress

Lily Laight as Marie (Child)

Freddie Rose as Child Thomas Edison

Doris Zajer as Mrs. Fortune