In pre-Second World War England, a leading film star and his wife attempt to recover a secret carburetor stolen by enemy agents. Based on a popular stage musical starring Hulbert and Courtneidge, a husband-and-wife team who had made a series of successful comedy films during the 1930s.
| Actor | Role |
|---|---|
 Jack HulbertJack Millett | Jack Millett |
 Cicely CourtneidgeKay Millett | Kay Millett |
 Austin TrevorBoris Vladimir | Boris Vladimir |
 Cecil ParkerSir Jeffrey Arlington | Sir Jeffrey Arlington |
 Glynis JohnsWinnie | Winnie |
| LLeonora CorbettCarole Markoff | Carole Markoff |
| HH.F. MaltbyColonel Sheepshanks | Colonel Sheepshanks |
| AAnthony HayesGeorge | George |
 Charles OliverCarl | Carl |
 Myrette MorvenMiss Stevens | Miss Stevens |