London at the turn of the century. Three men are on a mission from the IRA to steal all the gold in the vaults of the Bank of England. Norgate, their leader, discovers the bank's weak spot: an old forgotten sewer straight under the vaults.
Aldo Ray
as Charles Norgate
Elizabeth Sellars
as Iris Muldoon
Peter O'Toole
as Capt. Monty Fitch
Kieron Moore
as Walsh
Albert Sharpe
as Albert Tosher Sparrow
Joseph Tomelty
as Cohoun
Wolf Frees
as Dr. Hagen
John Le Mesurier
as Green
Miles Malleson
as Assistant Curator
Colin Gordon
as Benge
Andrew Keir
as Sergeant of the Guard
Hugh Griffith
as O'Shea