Leia and Mr. Jones appeared in an episode where Dr. Kenzo Tenma and Dieter were trying to hitch a ride to Freiham. The elderly English couple seemed to be on a "vacation" in Germany following Mr. Jones' retirement from his career as a policeman. When Leia spotted Tenma and Dieter by the roadside, she convinced her husband to stop and give them a lift, despite Jones' reluctance. However, when their car ran low on fuel and Tenma left with Dieter promising to return with help, the couple did not expect him to come back several hours later with borrowed jerry cans after walking down the road.
Afterwards, the couple treated Tenma and Dieter to dinner at a restaurant, where Tenma recommended they order a bottle of ungeheuer wine. While Mr. Jones, unlike his understanding wife, remained suspicious of Tenma due to his instincts as a former policeman (similar to Inspector Lunge), he had reasons to doubt his suspicions when the group decided to visit Steinbach Castle. There, after reminiscing about how their son Robert had fondly described the castle's beauty in a letter, they sadly recalled that Robert had committed murder there. After parting ways with Tenma and Dieter, the couple headed to Stadelheim Prison in Munich, where Robert was incarcerated. Before entering, Mr. Jones revealed to Leia that he knew Tenma was a fugitive after their earlier visit to the police station but believed in his innocence, just as he wanted to believe about Robert.
