The diggers and their officer, who has fallen for a nurse at the hospital, are subtly manipulated by a British intelligence officer to assist in passing false battle plans to the Germans. Given leave in England, they end up billeted at a country house and offered barley water instead of the home-brew they anticipated.
| Actor | Role |
|---|---|
| PPat HannaChic Williams | Chic Williams |
| JJoe ValliJoe McTavish | Joe McTavish |
 George MoonJoe Mulga | Joe Mulga |
| NNorman FrenchSir Guy Gough | Sir Guy Gough |
 Thelma ScottJudy Fisher | Judy Fisher |