 The premise of The Secret Service drew part of its inspiration from the Joe 90 episode "The Unorthodox Shepherd", which features the character of an aged, deaf vicar who covers up a money counterfeiting operation on his church grounds. Archer and Hearn comment on the wider influence of Joe 90 on its successor series, stating that The Secret Service "continues the espionage theme of Joe 90 in a range of adventures that depict a Britain under siege from despicable foreign agents intent on stealing its secrets."
