Tony Hudson offers his young wife Jane a cruise on a yacht as a honeymoon trip. Although Jane suffers from chronic seasickness, she accepts and one day they go on board the Turtle, a fine yacht owned by an industrialist friend, Dudley Partridge. A lot of misadventures await them before they finally reach France.
| Actor | Role |
|---|---|
 John GregsonTony Hudson | Tony Hudson |
 Cecil ParkerDudley Partridge | Dudley Partridge |
 June ThorburnJane Hudson | Jane Hudson |
 Keith MichellHarry Bell | Harry Bell |
 Elvi HaleAnn | Ann |
 Avice LandoneValerie Partridge | Valerie Partridge |
 Jacques BruniusMonsieur Charbonnier | Monsieur Charbonnier |
 Gabrielle BruneMary | Mary |
| CCharles ClaySir Harold Brazier | Sir Harold Brazier |
 Betty StockfeldLady Brazier | Lady Brazier |
 Michael E. BriantPaul | Paul |
| PPauline DrewettSusan | Susan |
 John HarveyFirst Officer | First Officer |
 Clement FreudCroupier (uncredited) | Croupier (uncredited) |
 Beth Rogan(uncredited) | (uncredited) |