Jackie's parents are in England to meet their new son-in-law. They come from South Africa, are very conservative and not too happy about their daughter being married to a village bobby. And they are not Mike's cup of tea either. A car is found in the middle of a stream. There is no sign of the driver or any passengers, but the hub cabs are missing. It turns out that the car belongs to Archie and Marian Drew and was stolen the previous day on the ferry from Amsterdam. Greengrass and David pick up Micky Shannon, who is travelling around the country collecting old folk tunes. Shannon also has a business proposition for Greengrass. He has seeds for thousands of rare orchids and wants Greengrass to grow them for him.

David is helping out in the kitchen during a dinner at Redwood House when the whole party is held at gunpoint by three robbers and the jewels of Joan Maltravers are stolen. The robbers get away although David manages to free himself and the cook Mrs. Woolley and call the police, but their car crashes when the police give chase and they have to continue on foot. David becomes the celebrity of the day and his fame is not diminished when he and Rosie find the stolen gems in the wrecked car. The relationship between Liz Merrick and Ben Norton has improved a lot since their first meeting so much in fact that when he is offered a job as an estate manager in Kenya he asks her to go with him - as his wife!