Edward Hardwicke

as Mr. Brownlow

as Reggie

as Sam's Grandfather

as Mr. Wood

as Wickfield

as Heaviside

as Ludovico H. Holly

as Richard Bannerman

as Zachariah

as Dr. Joseph

as Earl of Arundel

as Jonathan

as Sir Arthur Conan Doyle

as Lord Stanley

as Gov. John Bellingham

as Dr. Watson

as Warnie Lewis

as Patrick Siddons

as Dr. John Watson

as Dr. John Watson

as Tommy Bayne

as Dr. John Watson

as Approved School Principal

as Himself

as Henry Angkatell

as Dr. John Watson

as Dr. John Watson

as Dr. Watson

as Kinloch

as Gavin Barlow

as Marcus

as Dr. Pierre Dubois

as Guy Phillips

as Professor Proctor

as Dr. John H. Watson

as Dr. Alan Lyle

as Paediatrician

as Brinson

as Lord Dunning

as Dieter Stahl

as Enrico Fermi

as Christmas Humphries

as Mr. Girton

as Donald Sanders

as Inspector Black

as Biberstein

as Captain Paul Winter

as Mr. Girton

as Clive

as Bellcourt

as Gareth

as Gifford

as Mike McCarthy

as Arthur

as Charles Harold Calthrop

as Gifford

as Capt. Pat Grant

as Dr. Paul Richards

as Gareth

as Paediatrician

as Brinson

as Mitchell

as Lambert

as Pierre Chandebisse, Victor's Nephew

as Dr. Frank Yarrow

as Morris Dixon

as Montano

as Judas

as Ulvik

as George - English Boy (uncredited)