Secret Army (BBC wartime resistance serial, 1977-9)

"In the 1970s drama series 'Secret Army' concerning the Belgian resistance in World War II, a 1930s Paris open-back Renault bus appeared in one episode. In another episode,a Brussels tram appeared. I understand from a 1970s edition of'Modern Tramway' magazine that this episode was shot using a preserved 1920s car on a disused stretch of track" (thanks Alan Sinclair)