Original: The main cast of the 30th series consists of Russ Abbot as a former milkman who fancies himself a secret agent , Hobbo , Burt Kwouk as the electrical repairman , Entwistle , and Brian Murphy as the childish Alvin .
Simplified: The current cast is Russ Abbot as Hobbo Hobdyke , Burt Kwouk as Entwistle , and Brian Murphy as Alvin Smedley .