A house is broken into and Greig thinks he knows who did it. Greig visits the suspect's house. The injured boy's watch turns up in the bed of the suspect's son's. Polly is sent to St. Hughes to investigate an assault. The mother of the boy thinks it is bullying and that her son is not the only one. Her son's watch is missing. The school is unco-operative with D. S. Morgan. The injured boy gives Morgan the name of Greig's suspect's son. (thetvdb.com)