Edward Hardwicke

Self

Mr. Brownlow

Reggie

Leonard

Sam's Grandfather

Mr. Wood

Wickfield

Heaviside

Ludovico H. Holly

Wickfield

Richard Bannerman

Zachariah

Dr. Joseph

Earl of Arundel

Jonathan

Sir Arthur Conan Doyle

Lord Stanley

Gov. John Bellingham

Dr. Watson

Warnie Lewis

Patrick Siddons

Dr. John Watson

Dr. John Watson

Tommy Bayne

Dr. John Watson

Approved School Principal

Himself

Henry Angkatell

Dr. John Watson

Dr. John Watson

Kinloch

Gavin Barlow

Marcus

Dr. Pierre Dubois

Guy Phillips

Barry

Professor Proctor

Dr. John H. Watson

Peter Carmody

Dr. Alan Lyle

Paediatrician

Peter Topglass

Brinson

Lord Dunning

Dieter Stahl

Enrico Fermi

Christmas Humphries

Mr. Girton

Donald Sanders

Inspector Black

Biberstein

Captain Paul Winter

Baron Josef von Haller

Lieut. Colonel Rusper

Lieutenant Colonel Rusper

Mr. Girton

Clive

Bellcourt

Gareth

Gifford

Mike McCarthy

Arthur

Farmer John Lodge

Clive

Charles Harold Calthrop

Gifford

Capt. Pat Grant

Dr. Paul Richards

Gareth

Paediatrician

Brinson

Stephen

Mitchell

Judas Iscariot

Lambert

Pierre Chandebisse, Victor's Nephew

Dr. Frank Yarrow

Andrew Clavering

Morris Dixon

Montano

Judas

Ulvik

George - English Boy (uncredited)