Shadrach Smith and his school choir do their best to ensure that the local celebrities hired to appear at a concert in a village hall don't make it to the stage and slaughter anyone they believe is getting in their way.
| Actor | Role |
|---|---|
| GGrey EvansShadrach Smith | Shadrach Smith |
| HHywel GwynfrynHimself | Himself |
| DDafydd IwanHimself | Himself |
| DDyfan RobertsPoliceman | Policeman |
| WWynford Elis OwenChief Inspector Bevan | Chief Inspector Bevan |
 Dafydd HywelNot listed | Not listed |
| EEleanor DwyrydHerself | Herself |
| BBarry JohnHimself | Himself |
| EEleanor JonesHerself | Herself |
| JJohn Pierce JonesSecond Constable | Second Constable |
| CCharles WilliamsNot listed | Not listed |