Joey King as Bessie Cavallo

Abby Quinn as Josephine Cavallo

Cara Seymour as Katherine Wiley

Scott Shepherd as Mr. Leech

Susan Heyward as Etta

Neal Huff as Dr Flint

Collin Kelly-Sordelet as Walt

John Bedford Lloyd as Arthur Roeder

Olivia Macklin as Paula

Joe Grifasi as Grandpa

Brandon Gill as Thomas

Colby Minifie as Doris

Greg Hildreth as Henry Berry

Veanne Cox as Dr. Katherine Drinker

Tom Galantich as American Radium Lawyer

Steven Hauck as Dr. Marland

Carol Cadby as Mrs. Butkiss

Gina Piersanti as Hazel

Juliana Sass as Agnes

Neil Akins as Judge

Gemma Schreier as Reporter Radclyffe

Adam LeFevre as Carnival Barker

Andrew Meader as Speakeasy Cop

Michael Whittam as Speakeasy Cop

Jim Kambrich as Federal Judge Clarke

Heather Thiry as Court Stenographer

Grace Gray as Miriam

India Ennenga as Edna

Zazie Ray-Trapido as Frances

Dan Biddiscombe as Henchman

Evan Kuzma as Courthouse Protestor

Valerie Smaldone as Radio Announcer

Steve French as Radio Announcer