The Cast:

Boy Kavalier Samuel Blenkin
Atom Eins Adrian Edmondson
Arthur Sylvia David Rhysdahl
Dame Sylvia Essie Davis
Kirsh Timothy Olyphant
Joe Hermit Alex Lawther
Kumi Morrow Babou Ceesay
Wendy/Marcy Hermit Sydney Chandler
Curly Erana James
Nibs Lily Newmark
Smee Jonathan Ajayi
Slightly Adarsh Gourav
Toodles/Isaac Kit Young