Rebecca Hall

Character: Florence Cathcart

Dominic West

Character: Robert Mallory

Imelda Staunton

Character: Maud Hill

Isaac Hempstead Wright

Character: Tom

Lucy Cohu

Character: Constance Strickland

Cal MacAninch

Character: Freddie Strickland

John Shrapnel

Character: Reverend Hugh Purslow

Diana Kent

Character: Harriet Cathcart

Richard Durden

Character: Alexander Cathcart

Alfie Field

Character: Victor Parry

Tilly Vosburgh

Character: Vera Flood

Ian Hanmore

Character: Albert Flood

Andrew Havill

Character: George Vandermeer

Anastasia Hille

Character: Dorothy Vandermeer

Joseph Mawle

Character: Edward Judd

Shaun Dooley

Character: Malcolm McNair

Steven Cree

Character: Sergeant Evans

Felix Soper

Character: Julian Dowden

Sidney Johnston

Character: John Franklin

Spike White

Character: Alistair Howell

Charlie Callaghan

Character: Chris Hartley

James Kirkham

Character: William Ramsbottom

Ewan Andrew Walker

Character: Richard McGorian

Adam Thomas Wright

Character: Max Tebbitts

Ben Greaves-Neal

Character: Child Impostor

Daniel Pirrie

Character: Captain Mills

Nicholas Amer

Character: Edgar Hirsthwit

Nick Murphy

Character: Teacher 1

Neil Broome

Character: School Master (uncredited)