At the start of the first series of "Round the Horne" Douglas Smith took the traditional role of a BBC announcer on comedy shows, introducing the programme and its component parts and reading the credits at the end. As the show developed, the writers gave him more to do. In the second series Smith continually interrupts the programme to promote "Dobbiroids Magic Rejuvenators" (from "the makers of Dobbins Medical Cummerbunds for horses") and Dobbimist horse deodorant for UFO ("under fetlock odour"). In the third and fourth series he is included in the movie spoofs, playing a range of roles including a rumbling volcano: