This new special reveals the secrets of the long-running sitcom's extraordinary success. Helped by former cast and crew members, families of the stars no longer with us, and celebrity fans, we learn the secrets of this comedy classic and get to see previously unseen interviews and rare behind-the-scenes archive footage.
| Actor | Role |
|---|---|
 Stephen ManganSelf - Narrator | Self - Narrator |
| CCrispian SallisSelf | Self |
 Lesley GarrettSelf | Self |
 John ThomsonSelf | Self |
 Russ AbbotSelf | Self |
 Brian MurphySelf | Self |
 Tom OwenSelf | Self |
 Gyles BrandrethSelf | Self |
 Yolanda BrownSelf | Self |
| SSylvia KendallSelf | Self |
| AAndrew BraySelf | Self |
| JJackie FussellSelf | Self |
| DDennis FussellSelf | Self |
| AAngela CholmondeleySelf | Self |
 Sarah ThomasSelf | Self |
 Nick ParkSelf | Self |
| JJonathan LinsleySelf | Self |
| SStuart FellSelf | Self |
| MMorris BrightSelf | Self |
 Roy ClarkeSelf (voice, archive) | Self (voice, archive) |
 Andrew WildeSelf | Self |
| RRev Susan JacksonSelf | Self |
 Peter SallisSelf (archive) | Self (archive) |
 Bill OwenSelf (archive) | Self (archive) |
 Robert FyfeSelf (archive) | Self (archive) |
 Stephen LewisSelf (archive) | Self (archive) |
| AAlan J.W. BellSelf (archive) | Self (archive) |
 Frank ThorntonSelf (archive) | Self (archive) |
 Jeffrey ArcherSelf (archive) | Self (archive) |
 Kathy StaffSelf (archive) | Self (archive) |