Convict Gilbert – John Burgess
Convict Crosby – Tony Simpson
Det. Constable Grummett – Trevor Hall
Clara Grummett (his wife) – Sybil Wright
Alexander Grummett /their son) – Darren Crompton
Constable Mullins – John Taylor
Constable MacBain – Patricia Clough
Mavis Dawkins – Shelley Eccles
The Mayor – Jack Simpson