Murder 20 Criminal investigation 16 Video recordings for the hearing impaired 16 History 14 Investigation 13 Man-woman relationships 12 Police 11 more ... Country life 5 Families 5 Household employees 5 Kings and rulers 5 Murderers 5 Private investigators 5 Queens 5 Social classes 5 Social conditions 5 Barnaby, Chief Inspector (Fictitious character) 4 Businesspeople 4 Nobility 4 Serial murderers 4 Stores, Retail 4 Women detectives 4 Clerks (Retail trade) 3 Criminal behavior 3 Manners and customs 3 Social life and customs 3 Time travel 3 Action and adventure television programs 2 Aristocracy (Social class) 2 Biographical television programs 2 less ...