This episode features the story of Simon Buckden, who claimed he was a former war hero and promised to increase awareness of PTSD and raise money for cancer by running 100 marathons in 100 weeks. Buckden attracted many followers, but all was not as it seemed. Kevin also goes on raids with the British Transport Police to track down bogus collectors. The programme features a cold-calling company who pretended that they were raising money to support injured emergency service workers, and we meet the people behind a genuine charity that is trying to encourage stem cell donors from Britain's ethnic communities.